1. West of Öræfajökull, near Svínafell Collection: Icelandic and Faroese Photographs of Frederick W.W. Howell Location: Svínafell, Iceland Öræfajökull, Iceland Date: ca. 1900 Format: Image Creator: Howell, Frederick W. W.
2. Physiological features of roots: with especial reference to the relation of roots to aeration of the soil Creator: Cannon, William Austin, 1870- Collection: Core Historical Literature of Agriculture Publisher: The Carnegie Institution of Washington, Publication Place: Washington : Date: 1925 Format: Book
3. Root development of vegetable crops Creator: Weaver, John E. 1884-1966. Collection: Core Historical Literature of Agriculture Publisher: McGraw-Hill Book Company, Inc., Publication Place: New York : Date: 1927 Format: Book
4. Root disease fungi: a treatise on the epidemiology of soil-borne disease in crop plants, and a first exposition of the principles of root disease control Creator: Garrett, S. D. Collection: Core Historical Literature of Agriculture Publisher: The Chronica Botanica Company, Publication Place: Waltham, Mass. : Date: 1944 Format: Book