1. Tipi manufacturers can be found in ads in Native American - oriented magazines, newspapers, and mail-order catalogs.
4. Geodesic dome manufacturers put ads in housing-oriented magazines, and may have websites.
5. Log home companies can be located through magazines on long homes ask manufacturer about connecting rods, and what's needed to secure roofs.
6. "Pioneering Construction Ideas..." in Architectural Forum, January 1950, pp. 80-81, about rowlock brickwork with reinforced concrete filling. Recent research indicates more closely-spaced rebar is advisable.
9. FEMA P-320 "Taking Shelter From the Storm: Building or Installing a Safe Room for Your Home https://www.fema.gov/sites/default/files/documents/fema_taking-shelter-from-the-storm_p-320.pdf
FEMA 342 "Building Performance Assessment Report: Oklahoma and Kansas Tornadoes of May 3, 1999 - Observations, Recommendations, and Technical Guidance" (800) 480-2520 http://www.fema.gov/library/viewRecord.do?id=1423
10. Domical earth lodges were built (using log inner frame and shell) by several indigenous nations including Pawnee, Mandan, Hidatsa, and Arikara and have as much as 3' of soil covering the exterior. A car-drop test will verify the specifications of the reinforced concrete inner shell needed for a modernized version of the earth lodge.
