00336nam a2200097Ia 4500008004100000082002600041100003300067245008400100260004600184300000800230140113s9999    xx            000 0 und d  a378:331(047)(73)   K5  aNational Academy of Sciences  aCareer Patterns Report No. 1: Profiles of Ph.D's in the Science. Summery Report  a1965bNational Academy of SciencecU.S.A.  a123