00389nam a2200133Ia 4500008004100000082001600041100002400057245002700081260005100108300000800159650004100167650003400208653001300242170901s1967    xx            000 0 und d  a631.5bP30P  aPearson, C. Lorentz 0aPrinciples of Agronomy  aAmericabReinhold Publishing Corporationc1967  a433  aAgriculture and related technologies  aTechnology (Applied sciences)  aAgronomy