TY - BOOK AU - Edelman,Jack R. TI - The natural classroom: a directory of field courses, programs, and expeditions in the natural sciences SN - 1555919235 AV - QH50.5 .E34 1996 U1 - 508/.071 20 PY - 1996/// CY - Golden, Colo. PB - North American Press KW - Natural history KW - Study and teaching KW - United States KW - Directories KW - Research ER -