Cressy, Edward. Discoveries and inventions of the twentieth century / by Edward Cressy.

Cressy, Edward.

Discoveries and inventions of the twentieth century / by Edward Cressy.

London : G. Routledge and Sons, Ltd., 1914.

"In the nature of a sequel to Robert Routledge's Discoveries and inventions of the nineteenth century."

Inventions.

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