Klose, N. (1982). America's crop heritage: The history of foreign plant introduction by the Federal Government. University Microfilms International.

Klose, Nelson. America's Crop Heritage: The History of Foreign Plant Introduction by the Federal Government. Ann Arbor: University Microfilms International, 1982.

Klose, Nelson. America's Crop Heritage: The History of Foreign Plant Introduction by the Federal Government. University Microfilms International, 1982.