Sunlight and shadows / [electronic resource] John and Cathleen Polgreen.
Material type: TextPublication details: Garden City, N.Y. : Doubleday, 1967.Edition: 1st edDescription: 57 p. : ill. (part col.) ; 29 cmSubject(s): DDC classification:- 525/.5
- QC 381.6 .P64
- PZ10.P62
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An explanation of why shadows exist and how they are affected by changing seasons.
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