00430nam a2200145Ia 4500003000400000005001700004008004100021040002900062050002200091100003800113245003200151260003500183300003300218650003300251OSt20230808095949.0221221s9999    xx            000 0 und d  cChuka University Library  aLB 1585 bS3 1968  a MacCracken, Helen Dolman [et al] 0aScience through Discovery 1  aNew YorkbL.W Singer co.c1968  a153p.bColored illustrations  aScience xStudy and teaching