000 00295nam a22000977a 4500
008 150820b xxu||||| |||| 00| 0 eng d
082 _a312 SPE
100 _aSPENGLER, J.J
245 _aPOPULATION ECONOMICS:
_bSELECTED ESSAYS OF JOSEPH J. SPENGLER
260 _aNORTH CAROLINA
_bDUKE UNIVERSITY PRESS
_c1972
999 _c338
_d338