National Academy of Sciences

Amphibians: Guidelines for the Breeding, Care and Management of Laboratory Animals

Material Aspects of World Energy Needs

By Manly, William D.

Human Vitamin B6 Requirements

By H. N. Munro

Folic Acid: Biochemistry and Physiology in Relation to the Human Nutrition Requirement

By C.E. Butterworth

Ecological Basis for Subsistence Change Among the Sandawe of Tanzania

By James L. Newman