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  • Inventions and their uses in science today / by H. Stafford Hatfield.
    • 608 H362
    • Hatfield, H.
    • Penguin Books,
    • 1940.
    • England ; New York :




  • Science in war.
    • 355 S4161
    • Penguin Books,
    • 1940.
    • New York :