Har Mohan Singh. A psychological study of the experimenter's effects on the performance of the subject / Har Mohan Singh - Agra : National Psychological Corp., 1979 - 79 p. ; 22 cm. - Bhargava Research Monograph series ; no.9 . ISBN: Rs. 15.00 Subjects--Topical Terms: Social psychology Dewey Class. No.: 301.15