00338nam a2200109Ia 4500082002600000100003700026245008600063260002800149300001600177500000500193700003000198  a307.72097295bB775.TY  aBourne, D. D., and Bourne, J. R.  aThirty years of change in Puerto-Rico; a case study of ten selected rural areasb  aNew YorkbPraegerc1966  axxvi, 411p.  a  aBourne, J. R. ; jt. auth.