TY - BOOK AU - Hart, William Le Roy, AU - ED - ED - ED - ED - SN - 971-08-1916-X (newsprint) SN - 2 PY - 1964///]46 CY - Boston PB - D.C. Heath KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Plane trigonometry.;Spherical trigonometry N1 - On cover : with tables.;Includes index.;Logarithmic and trigonometric tables, compiled by William L. Hart... Boston, New York [etc.] D. C. Heath and Company [c1933] (iii, 124 p.); 5 ER -