1. Peat bogs of southeastern Canada.;Auer;Geol. Surv. Can. Mem.,1930
2. M. Baldwin, C.F. Kellogg, and J. Thorp, 1938. Soil classification. Soils and Men. 1938 Yearbook of Agriculture. U.S. Dept. of Agriculture, pp. 979–1001.
3. A revised classification and nomenclature of microscopic soil materials with particular reference to organic components.;Barratt;Geoderma,1969
4. Physical properties of peats as related to degree of decomposition.;Boelter;Soil Sci. Soc. Am. Proc,1969
5. Estimate of organic carbon in world soils.;Bohm;Soil Sci. Soc. Am J.,1976