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1. Biological education in American secondary schools, 1890-1960.

by Hurd, Paul DeHart, 1905-, Hurd, Paul DeHart, 1905-.

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: Washington, American Institute of Biological Sciences [1961]Availability: No items available

2. New directions in elementary science teaching [by] Paul DeHart Hurd [and] James Joseph Gallagher.

by Hurd, Paul DeHart, 1905-, Hurd, Paul DeHart, 1905- | Gallagher, James Joseph, 1932-, Gallagher, James Joseph, 1932-.

Material type: book Book; Format: print ; Literary form: Not fiction Publisher: Belmont, Calif., Wadsworth Pub. Co. [1968]Availability: No items available