N is also for Nk'Mip, but that's another story for another time.
P is rich with content and entries. (Say that out loud in a crowded room.)
Patty, Ralph L. Clay Soil Unfavorable for Rammed Earth Walls. South Dakota Agricultural Experiment Station, Bulletin No. 298, March, 1936. 23 pages.
(what would our friends at MIT have to say about that?)
Patty, Ralph L., "Soil Admixtures for Earth Walls," Agricultural Engineering, p. 291, September, 1942.
Patty, Ralph L., "Specifications for Rammed Earth Construction," Agricultural Engineering, p. 476, November, 1936
Patty, Ralph L., and Minimum, L. W. Rammed Earth Walls for Farm Buildings. South Dakota Agricultural Experiment Station Bulletins No. 277, April, 1933. 67 pages.
"Proceedings of the Conference on Soil Stabilization," Massachusetts Institute of Technology, 1952.
"Pneumatic Tamping in Rammed Earth Wall." Agricultural Engineering, St. Joseph, Mich., August 1929.
"The Properties of Compacted Soil and Soil Cement Mixtures for Use in Building." T. L. Webb., T. F. Cilliers, and N. Sutterheim. National Building Research Institute, South African Council on Scientific and Industrial Rresearch, Pretoria 1950, Series DR2.