[As quoted in Robert C. Twombly, Frank Lloyd Wright: His Life and His Architecture (New York: John Wily and Sons, 1979), 321]
http://www.nps.gov/nhl/designations/samples/ny/Guggenheim.pdf, page 24
  1. ^ See the NCBI webpage on Haloquadratum. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
  2. ^ Stoeckenius W (1 October 1981). "Walsby's square bacterium: fine structure of an orthogonal procaryote". J. Bacteriol. 148 (1): 352–60. PMID 7287626.