Helen Dolman MacCracken.
Teacher's annual for How and why discoveries, a teacher's manual and science handbook to accompany How and why discoveries. (How and why science series, book 6)
R617828. Teacher's annual for How and why discoveries, a teacher's manual and science handbook to accompany How and why discoveries. By Helen Dolman MacCracken. (How and why science series, book 6) © 9Oct48; AA103049. Random House, Inc. (PWH); 12Nov75; R617828.
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