Author

Percival John Fryer

2 books found

Cover of Insect pests and fungus diseases of fruit and hops

Insect pests and fungus diseases of fruit and hops

Percival John Fryer · First published 1920

Cover of Technical Handbook of Oils, Fats and Waxes

Technical Handbook of Oils, Fats and Waxes

Percival John Fryer · First published 1920