TY - BOOK AU - Spengler,Joseph J. TI - Population change, modernization, and welfare SN - 0136871526 AV - HB871 .S63 U1 - 301.32 PY - 1974///] CY - Englewood Cliffs, N.J. PB - Prentice-Hall KW - Population KW - Developing countries N1 - Bibliography: p. 171-174 ER -