III · Science
Evaluation and action in the social environment
Subjects
Action research · Evaluation research (Social action programs) · Social service · Research · Congresses · Edible Grain
Language
ENG
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![Cover of [William Wheeler Hubbell, authorized to apply for patents.] by United States. Congress. Senate. Committee on Patents](https://covers.openlibrary.org/b/id/10200621-M.jpg)
