TY - BOOK AU - Botkin,Daniel B. AU - Keller,Edward A. TI - Environmental studies: the Earth as a living planet SN - 0675204623 PY - 1987/// CY - Columbus, [Ohio] PB - C.E. Merrill Pub. Co. KW - Ecology KW - Pollution KW - Environmental aspects KW - Conservation of natural resources N1 - Includes bibliographies and index; Open access ER -