00370nam a2200121Ia 4500082002000000100004900020245005600069260003000125300002400155490003100179500000500210700003300215  a379.11bP974.RE  aPsacharopoulos, George and Hinchliffe, Keith  aReturns to education; an international comparisonb  aAmsterdambElsevierc1973  axiv, 216p. Appendix  aStudies on Educationv v.2  a  aHinchliffe, Keith; jt. auth.