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Canyons and mesas/ by Doolittle, Jerome

Health Life Science/ by Bierer M, Loretta

Introduction to Biology/ by Mackean, D.G

A Guide to the Study of Environmental Pollution (Contours, studies of the environment)/ by Andrews, william A

Principles of Genetics/ by Gardner, Eldon John

The Professional Education of Teachers / by Combs, Arthur W.

වර්ෂා3 by ආරච්චි, සුජිව ප්‍රසන්න

Subjects: “…සාහිත්‍ය…”

Biology:Advanced Level/ by Marshall, P.T

Make the Grade in General Certificate of Secondary Education Biology (Teach Yourself)/ by Taylor, Sue

Plants, People and Environment/ by Kaufman B, Peter

Environmental pollution by chemicals/ by Walker, C.H

Learn: Biology: The Easy Way/ by Hartman M, Harold

Life: An Introduction to Biology/ by Simpson Gaylord, George

வசாப்பு / by உதயன், எஸ்.ஏ

மாற்றம் காணும் மலையக சமூகம் / by கீதபொன்கலன், ச.

மறைந்தும் மறையாதவர்கள்/ by இரகுபதிபாலஶ்ரீதரன். ஆ

වර්ෂා2 by ආරච්චි, සුජිව ප්‍රසන්න

Subjects: “…සාහිත්‍ය…”

Botany:A Human Concern/ by Rayle, David

கூலித் தமிழ்/ by நித்தியானந்தன், மு

The Flowering Plants of Ceylon:an etymological and historical study/ by Gunawardena,D.C