4 1 40 Principles and Methods SMITH, T. Lynn Primary Author ZOPF, Paul E. Additional Author mixed material 0803679203 Philadelphia F. A. Davis company 1970 Demography_Principles_and_Methods.jpg a directory of intitutions in the ECAFE region Asian Population Studies Series No. 8 United Nation Primary Author mixed material Hoboken, NJ United nations 1972 Spiegelman,Mortimer Primary Author Miller,Morton D Primary Author mixed material USA Harvard University Press 1970 Coale,Ansley J Primary Author Brass,wiliam Primary Author mixed material USA Princeton University Press6c1953 1968