[3] Coleman, D. A., “Environmental Factors Influencing the Activity of Soil Fungi,” Soil Sci., 1916, v., 2.
[4] Conn, H. J., “The Microscopic Study of Bacteria and Fungi in Soil,” N.Y. Agric. Expt. Sta., 1918, Bull. 64.
[5] Dale, E., (a) “On the Fungi of the Soil,” Ann. Mycol., 1912, 10; (b) “On the Fungi of the Soil,” Ann. Mycol., 1914, 12.
[6] Fischer, H., “Bakteriologisch-chemische Untersuchungen; Bakteriologischen Teil,” Landw. Jahrb., 1909, 38.
[7] Goddard, H. M., “Can Fungi living in Agricultural Soil Assimilate Free Nitrogen?” Bot. Gaz., 1913, 56.
[8] Hagem, O., (a) “Untersuchungen über Norwegische Mucorineen I., Vidensk. Selsk, I.,” Math. Naturw. Klasse, 1907, 7; (b) “Untersuchungen über Norwegische Mucorineen II., Vidensk. Selsk. I.,” Math. Naturw. Klasse, 1910, 10.
[9] Jensen, C. N., “Fungus Flora of the Soil,” N.Y. (Cornell) Agric. Expt. Sta., 1912, Bull. 315.
[10] Jones, D. H., and Murdock, F. G., “Quantitative and Qualitative Bacterial Analysis of Soil Samples taken in Fall of 1918,” Soil Sci., 1919, 8.
[11] Kopeloff, N., “The Effect of Soil Reaction on Ammonification by Certain Soil Fungi,” Soil Sci., 1916, 1.
[12] Lendner, A., “Les Mucorinées de la Suisse,” 1908.