National Bureau of Standards monograph
United States Department of Commerce
NBS monograph
Bean B.R. and Thayer G.C.
U.S. Dept. of Commerce, National Bureau of Standards 1959 National Bureau of Standards monograph 4
Available at 1 libraries
U.S. Dept. of Commerce, National Bureau of Standards 1959 National Bureau of Standards monograph 1
Available at 2 libraries