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1. Experimental investigation of children's concepts of mass, weight and volume

by Narayana Rao, S | S.V.University, Tirupati.

Publisher: ICSSR, New Delhi 1974Availability: Items available for reference: [Call number: RN.0005] (1).

2. Study of relationship between socio-economic status and conservation of number and substance in Delhi school children

by Nilima Kumari | Sengupta, B.

Publisher: Jamia Millia Islamia 1985Availability: Items available for reference: [Call number: TN.0083] (1).

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