TY - BOOK AU - Creswell,John W TI - Research Design: qualitative, quantitative, and mixed methods approaches SN - 0761924426 : U1 - 300.72 19 PY - 2003/// CY - Thousand Oaks PB - Sage Publications KW - Science Methodology KW - Spines KW - Statistical analysis N1 - cse N2 - Social Science ER -