Mukhopadhyay, Marmar Miyan, Girija Mohd. Parhar, Madhu text New Delhi Amar Prakashan 1993 monographic 257p ; 24cm edited by Marmar Mukhopadhyay, Jirija Mohd. Miyan [and] Madhu Parhar Education technology Distance education 370 OPT 8185420432 A-682420 Cen Lib/Ret DPL EN