Production Variables Affecting Follicle and Biomass Development in Common Milkweed—Winthrop B. Phippen
The Milkweed Business—Herbert D. Knudsen and Richard D. Zeller
Milkweed Cultivation for Floss Production—Merle D. Witt and Herbert D. Knudsen
Diversifying U.S. Crop Production—Jules Janick, Melvin G. Blase, Duane L. Johnson, Gary D. Jolliff, and Robert L. Myers
Handbook of Energy Crops—James A. Duke. 1983. unpublished.