Science

Prolegomena

Immanuel Kant

Geography

Harm J. de Blij

Environmental science

G. Tyler Miller

The Dragons of Eden

Carl Sagan

Das Finanzkapital

Rudolf Hilferding

Ideen zu einer reinen Phänomenologie und phänomenologischen Philosophie

Edmund Husserl

Far away and long ago

W. H. Hudson

Handbook of Flowering

Abraham H. Halevy

The Evolution of Man

Ernst Haeckel

Progress in Optics

Emil Wolf

Solid State Physics

Frederick Seitz

Horizons

Michael A. Seeds

Handbook of learning and cognitive processes

William K. Estes

Handbook of nature-study for teachers and parents

Anna Botsford Comstock

An Examination of Sir William Hamilton's Philosophy

John Stuart Mill

Federal research

United States. General Accounting Office

Nutrition

Frances Sizer Webb

Microbiology

John Wade Foster

Herrn Eugen Dührings Umwälzung der Wissenschaft

Friedrich Engels

Out of my later years

Albert Einstein