TY - BOOK ID - 137030226 TI - Ecological systems and the water resource AU - Leopold, Luna B. AU - Geological Survey (U.S.) PY - 1960 PB - Washington : Washington : United States Department of the Interior, Geological Survey, United States Department of the Interior, Geological Survey, DB - UniCat KW - Water resources development. KW - Conservation of natural resources. UR - https://www.unicat.be/uniCat?func=search&query=sysid:137030226 AB - ER -