Hänninen, Pentti, and Armi Kaila. “Calcium Nitrate and Ammonium Nitrate Limestone As Sources of Nitrogen for Oats and Barley”. Agricultural and Food Science 33, no. 1 (January 1, 1961): 159–168. Accessed November 26, 2024. https://journal.fi/afs/article/view/71547.