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Authors

Author

Percival John Parrott

Books

Comparative Efficiency of Dust and Spray Mixtures in Controlling the Currant Aphis
Comparative Efficiency of Dust and Spray Mixtures in Controlling the Currant Aphis
Percival John Parrott
The Status of Spraying Practices for the Control of Plant Lice in Apple Orchards
The Status of Spraying Practices for the Control of Plant Lice in Apple Orchards
U. P. Hedrick, Fred Carlton Stewart, Percival John Parrott, Mancel Thornton Munn, George Henry Howe, Forest Milo Blodgett, Orrin Morehouse Taylor, James Duncan Brew, Joseph Frederick Barker
The Velvet-stemmed Collybia
The Velvet-stemmed Collybia
Fred Carlton Stewart, Percival John Parrott, Frederick Zeller Hartzell, Whitman Howard Jordan, Godfrey Leonard Alvin Ruehle, Robert Stanley Breed, Orrin Morehouse Taylor, Fred Elmer Gladwin, Mancel Thorton Munn
The Status of Spraying Practices for the Control of Plant Lice in Apple Orchards
The Status of Spraying Practices for the Control of Plant Lice in Apple Orchards
Percival John Parrott
The Rosy Aphid in Relation to Spray Practices in 1929
The Rosy Aphid in Relation to Spray Practices in 1929
Percival John Parrott

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