John H. Yopp
John H. Yopp
3 featured booksJohn H. Yopp
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OL1902032A
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3 representative editions
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- Image source: Open LibrarySI
Symmetries in science IV
cover - BABioassays and other special tec...John H. Yopp
Bioassays and other special techniques for plant hormones and plant growth regulators
no cover - DODetermination of maximum permis...John H. Yopp
Determination of maximum permissible levels of selected chemicals that exert toxic effects on plants of economic importance in Illinois
no cover
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