Plane and spherical trigonometry / Alfred L. Nelson and Karl W. Folley. Nelson, Alfred Lewis, 1891- Folley, Karl Wilmot, 1905- joint author. Trigonometry. QA531 .N45 514 NEP With five-place tables. "Answers": p. 171-182. With this is bound: Five-place tables: logarithms, logarithmic functions, natural funcions, compiled by N. J. Lennes and A. S. Merrill, New York and London [c1928] New York, Harper, 1936. 1936. 1936 Text xii, 186 p. : eng