00689cam a22002051 4500 sa 64008568 DLC 20260227112055.0 810925s1964 ii a b 000 0 eng sa 64008568 PL480:I-E-3438 DLC DLC DLC Q182.3 .N37 1964 National Institute of Education (India). Department of Science Education. General science handbook of activities, classes VI-VIII. [New Delhi] National Council of Educational Research and Training [1964] iv, 458 p. illus. 28 cm. Bibliography: p. [435]-441. Science Laboratory manuals. 60927 60927