00446nam a22001337a 4500 533940 533940 9789819604166 B084 Is4 Islam, M. Rezaul 62029 Principles of social research methodology edited by M. Rezaul Islam, Niaz Ahmed Khan & Rajendra Baikady Singapore Springer 2022 508p. Social science - Research - Methodology 62030 Research - Methodology 62031