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Insecticides and fungicides : spraying and dusting equipment : a laboratory manual with supplementary text material / by O.G. Anderson and F.C. Roth.
- Wiley [etc.],
- 1923.
- New York [etc.] :
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The soybean / by Charles V. Piper and William J. Morse.
- McGraw-Hill,
- 1923.
- New York [etc.] :