cooperative project of the Russian Academy of Agricultural Sciences and the United States Department of Agriculture, Natural Resources Conservation Service = Zashchita pochv i vodnykh resursov / sovmestnyĭ proekt Rossiĭskoĭ akademii selʹskokhozi︠a︡ĭstvennykh nauk i Sluzhby okhrany prirodnykh resursov Ministerstva selʹskogo khozi︠a︡ĭstva SShA