TY - BOOK AU - Creswell,John W. TI - Research design: qualitative & quantitative approaches SN - 0803952546 AV - H62 .C6963 1994 U1 - 300/.72 20 PY - 1994/// CY - Thousand Oaks, Calif. PB - Sage Publications KW - Social sciences KW - Research KW - Methodology KW - Statistical methods N1 - Includes bibliographical references (p. 209-216) and indexes ER -