371/BHA LCLIB/EduSem/44493 LCLIB/EduSem/371/BHA B12718
Bhattacharya, S.P. Personalized system of instruction (PSI) or Keller Plan - Delhi : Ajanta Publications, 1992 44p : 20 cm Includes bibliography 8120203771 : Rs 85 * Education Learning * * Teaching, Learning * Teaching
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