LITERATURE CITED
- Gerdemann, J. W., and J. M. Trappe. 1974. The Endogonaceae in the Pacific Northwest. Mycologia Mem. 5: 1–76.
- Lundeberg, G. 1970. Utilization of various nitrogen sources, in particular bound soil nitrogen, by mycorrhizal fungi. Stud. Forest. Suec. 79: 1–95.
- Trappe, J. M. 1967. Principles of classifying ectotrophic mycorrhizae for identification of fungal symbionts. XIV Int. Union Forest Res. Organ. Sec. 24 5: 46–59.