TY - BOOK AU - Ford,Thomas R. AU - De Jong,Gordon F. TI - Social demography T2 - Prentice-Hall sociology series SN - 0138155550 U1 - 304.6 16 PY - 1970/// CY - Englewood Cliffs, N.J. PB - Prentice-Hall KW - Demography KW - Sociology N1 - Includes bibliographical references ER -