Online Public Access Catalogue (OPAC)
Library,Documentation and Information Science Division

“A research journal serves that narrow

borderland which separates the known from the unknown”

-P.C.Mahalanobis


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Sunlight and shadows / [electronic resource] John and Cathleen Polgreen.

By: Contributor(s): Material type: TextTextPublication details: Garden City, N.Y. : Doubleday, 1967.Edition: 1st edDescription: 57 p. : ill. (part col.) ; 29 cmSubject(s): DDC classification:
  • 525/.5
LOC classification:
  • QC 381.6 .P64
  • PZ10.P62
Online resources: Summary: An explanation of why shadows exist and how they are affected by changing seasons.
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An explanation of why shadows exist and how they are affected by changing seasons.

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