00293nam a2200097Ia 4500008004100000082001600041100005000057245004700107260003300154300000800187140113s9999    xx            000 0 und d  a51:633   P2  a"Overman, Allen.R. & Schaltz III, Richard.V."  aMathematical Models of crop growth & yield  a2002bCRC Press cBoca Raton  a328