text London SAGE 1980 2nd ed. eng 532 p. : ill. ; 21 cm. Michael Quinn Patton Bibl.: p. 523.-- Index: p. 525-532 RESEARCH METHODS EVALUATION 303.832 303.832 PAT q 0-8039-3779-2 241029 20241029101735 INLIS000000000007412 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)