Chickermane, D. V. Arresting stagnation in small one-teacher rural primary schools : an Indian experiment in non-grading / by D. V. Chickermane. - París : New York : UNESCO ; UNICEF, 1981. - 10 p. - Notes, comments... ; 74 . No. de Clasificación Universal Decimal: 371.212. 72 (540)=20 CHI No.74