00342nam a2200097Ia 4500008004100000082002300041100003300064245009300097260004600190300000800236140113s9999    xx            000 0 und d  a376.68(082.2)   L1  aNational Academy of Sciences  aUndergraduate Education in the  Sciences for students in agriculture & natural resources  a1971bNational Academy of SciencecU.S.A.  a169