Gertrude Stein is Gertrude Stein is Gertrude Stein: her life and work,

The extremists: gadflies of American society.

Cells: units of life.

Our plant friends and foes.

John James Audubon,

To America

700 science experiments for everyone.

Jupiter, the largest planet.

Metrically yours /

The story of cosmic rays,

The story of the earth's magnetic field.

Frontier nurse: Mary Breckinridge,

Mike Fink, best of the keelboatmen, being a revealing and trustworthy account of events in the life of the renowned riverman...

How to ride and jump your best.

Inventors of the world /

City; a story of Roman planning and construction.

Charles Proteus Steinmetz, wizard of electricity,

Energy for the 21st century /

Energy: power for people

The story of the laser.