00285nam a2200121 a 450000500170000002000150001708200130003210000220004524500270006725000130009426000310010730000250013820251203090730.0  a0879010312  a330bSPE  aSpencer,Milton H.  aContemporary economics  a2nd edn.  aNew YorkbWorth Pub.c1974  axxv, 662p.c26cm. HB