Yadav, R N S. Distance education : theory & practice / R N S Yadav - Chandigarh : Abhishek Publication ; 2002. - 314 p. : ill. ; 24 cm. ISBN: 8185733465 Subjects--Topical Terms: Distance educationDistance teachingCommonwealth Dewey Class. No.: 374.4 / YAD P02D