TY - BOOK AU - Wellman, B. Leighton AU - ED - ED - ED - ED - SN - 2 PY - 1957///46 CY - New York PB - McGraw-Hill KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Geometry, Descriptive N1 - 5 ER -