Sys, C.
Land evaluation : principles in land evaluation and crop production calculations / C. Sys,...E. Van Ranst,...Delaveye,... . - Brussels : General administration for development cooperation, 1991 . - 273p. ; 30Cm. - Agricultural publication 7 .
631. 48.
Land evaluation : principles in land evaluation and crop production calculations / C. Sys,...E. Van Ranst,...Delaveye,... . - Brussels : General administration for development cooperation, 1991 . - 273p. ; 30Cm. - Agricultural publication 7 .
631. 48.