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
525/.5 Polgreen, John. Sunlight and shadows / John and Cathleen Polgreen. - 1st ed.. - Garden City, N.Y. : Doubleday, 1967. 57 p. : ill. (part col.) ; 29 cm. * Seasons - Juvenile literature. Shades and shadows - Juvenile literature. Solar radiation. Shadows. Seasons. * Polgreen, Cathleen, * Title