III · Science
The Blackbirch Encyclopedia of Science & Invention (Blackbirch Encyclopedia)
Subjects
History of science & technology · Reference works · Reference - Encyclopedias · Encyclopedias · Juvenile Nonfiction · Children's 9-12 - Science
Language
ENG
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![Cover of [William Wheeler Hubbell, authorized to apply for patents.] by United States. Congress. Senate. Committee on Patents](/img/cover/10200621-M.jpg)
