Comparison of inert-gas-fusion and modified Kjeldahl techniques for determination of nitrogen in niobium alloys /

by Merkle, Emery J.
Washington, D.C. : [Springfield, Va.] : National Aeronautics and Space Administration ; [For sale by the National Technical Information Service], 1974

Interlaboratory comparison of chemical analysis of uranium mononitride /

Washington, D.C. : [Springfield, Va.] : National Aeronautics and Space Administration ; [For sale by the National Technical Information Service], 1974