TY - BOOK AU - Subramanian V TI - Textbook in environmental science SN - 8173194106 (pbk) U1 - G:55, P2;2 PY - 2002/// CY - New Delhi PB - Narosa Publishing House KW - Ecology KW - Environment biology KW - Biology N1 - Bibliographical references 225-229p; Index 233-238p ER -