TY - BOOK AU - Sharpe,Grant William TI - Interpreting the environment SN - 0471778966 AV - QH51 .I5 U1 - 350/.863 PY - 1976/// CY - New York PB - Wiley KW - Natural history KW - Study and teaching KW - Nature study KW - Park rangers KW - National parks and reserves N1 - Includes bibliographies and index ER -