Chemical composition of crops as affected by different quantities of irrigation water - a Utah Agricultural Experiment Station Bulletin, no. 120, dated 1912, written by John A. Widtsoe.
Irrigation investigations: factors influencing evaporation and transpiration, a Utah Agricultura Experiment Station Bulletin, no. 105, dated August 1909, written by John A. Widtsoe
Correspondence of John A. Widtsoe, between 1912 and 1914, regarding his publications.
Principles of Irrigation Practice by John A. Widtsoe, 1914. From the Rural text-book series.