Polgreen, John. Sunlight and shadows / [electronic resource] / John and Cathleen Polgreen.. — 1st ed.. — Garden City, N.Y. : : Doubleday,, 1967.. — 57 p. : : ill. (part col.) ; 29 cm.



Анотація:
An explanation of why shadows exist and how they are affected by changing seasons.

LCCN: 67010681

Subjects--Topical Terms:
Seasons--Juvenile literature.
Shades and shadows--Juvenile literature.
Solar radiation.
Shadows.
Seasons.

LC Class. No.: QC 381.6 / .P64 PZ10.P62

Dewey Class. No.: 525/.5