01317nam 2200385 450 991083027430332120230213223937.00-89118-285-3(CKB)3810000000041858(WaSeSS)IndRDA00111552(EXLCZ)99381000000004185820190320d1971 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierAgronomy in a changing world and research needs for the seventies /editors, C. A. Black [and three others]Madison, Wisconsin :American Society of Agronomy :Crop Science Society of America :Soil Science Society of America,1971.1 online resource (v, 65 pages)ASA Special Publication ;Number 190-89118-139-3 ASA special publication ;Number 19.Agricultural ecologyAgricultureResearchAgricultural ecology.AgricultureResearch.577.55Black C. A(Charles Allen),WaSeSSWaSeSSBOOK9910830274303321Agronomy in a changing world and research needs for the seventies4002993UNINA