Station, Texas: Texas A&M University Press, 2002, First edition 2001. ISBN 978-1-58544-146-4 Heppenheimer, T. A. "Facing the Heat Barrier: A History of Hypersonics
Detail. Carrollton, Texas: Squadron/Signal Publications Inc., 1999. ISBN 1-888974-13-3. Kit, Mister and Jean-Pierre De Cock. North American B-25 Mitchell
swamp sunflower – Texas + Florida north to southern Illinois + Long Island Helianthus annuus L. – common sunflower, girasol – most of United States + Canada