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1
The locust borer /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
2
The pine bark aphid /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
3
Bark beetles and ambrosia beetles /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
4
The elm leaf beetle /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
5
The gipsy moth /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
6
The bronze birch borer /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
7
The control of insect pests of shade and ornamental trees /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
8
Leaf eating insects /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
9
Powder-post beetles of the genus lyctus /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
10
The leopard moth /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
11
Aphids or plant lice /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
12
The imported willow leaf beetle /
by Knull, Josef Nissley, 1891-
Harrisburg, Pa. : Pennsylvania Department of Forests and Waters, 1933

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Government Document Book Chapter
13
Ants and trees /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
14
Termites or white ants /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
15
Twig and branch pruners /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
16
The mottled willow borer /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
17
Scale insects /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
18
The two-lined chestnut borer /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Department of Forests and Waters, 1933

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Government Document Book Chapter
19
The white pine weevil /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
20
The carpenter worm /
by Knull, Josef Nissley, 1891-1975
Harrisburg, Pa. : Pennsylvania Dept. of Forests and Waters, 1933

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Government Document Book Chapter
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