1. The characterization of slope positions and their influence on the total nitrogen content of a few virgin soils of western Iowa;Aandahl,1948
2. Some properties of a chrono-toposequence of soils from granite in New Zealand, 1. Profile weights, and general composition;Adams;Geoderma,1975
3. The significance of truncation in the evolution of slope soils in mid-Wales;Adams;J. Soil Sci.,1978
4. Soil Survey of Centre County, Pennsylvania;Braker,1981
5. Geology and mineral resources of the Bellefonte Quadrangle, Pennsylvania;Butts;U.S. Geol. Surv. Bull.,1936