TY - BOOK ID - 136623256 TI - Proceedings of the Geology and Food Conference, with related U.S. Geological Survey projects and a bibliography AU - Raup, Omer B. AU - Walker, Flora K. AU - Geological Survey (U.S.) PY - 1977 PB - [Reston, Virginia] : United States Department of the Interior, Geological Survey, DB - UniCat KW - Fertilizers KW - Research KW - Geological Survey (U.S.) UR - https://www.unicat.be/uniCat?func=search&query=sysid:136623256 AB - ER -