Principles of agricultural chemistry
50th Annual Report of the Pennsylvania Agricultural Experiment Station for the Fiscal Year Ended June 30, 1937
Polyporaceae of Pennsylvania
Agricultural Chemistry
Bulletin
Bulletin
Agricultural Chemistry
Chemistry of Insecticides, Fungicides and Herbicides
A Catalogue of Insecticides and Fungicides Comp. by Donald E.H. Frear
Bulletin
Bulletin
A catalogue of insecticides and fungicides
Survey of European Non-conventional Chemical Notation Systems
Chemistry of Insecticides, Fungicides, and Herbicides
Chemistry of the Pesticides
Polyporaceae of Pennsylvania
A Catalogue of Insecticides and Fungicides: Chemical fungicides and plant insecticides
A Catalogue of Insecticides and Fungicides: Chemical insecticides
Pesticide Index