TY  - BOOK
AU  - Versteeg,M.N.
TI  - Factors influencing productivity of irrigated crops in S.Peru,in relation to prediction by simulation models
PY  - 1985///
PB  - Proefschr.,Landb.Hogeschool,Wageningen,Graf.Bedrijf Ponsen & Looijen,182pp.
ER  -