TY - BOOK AU - Crathorne, A. R. AU - Moore, Gerald E. CN - QA533 .C853 CN - QA533 CY - New York, DA - [c1941] ID - 64833 KW - Plane trigonometry. KW - Logarithms. PB - H. Holt and company PP - New York, PY - [c1941] T1 - Brief trigonometry;a text in twenty assignments TI - Brief trigonometry;a text in twenty assignments ER -