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Books about Pietenpol:
Bernard Pietenpol, Mementos and Memories by Linda Pietenpol Kelley, Libby Kelley, Linda Kelley and Matt Kelley (Jul 9, 2012)
The Pietenpol Story by Chet Peek (2006)
Die Werke von Daniel Bernoulli, Band 3: Mechanik. Bearbeitet und kommentiert von David Speiser, A. de Baenst-Vandenbroucke... by Daniel. BERNOULLI (1987)
Bernard Pietenpol, Mementos and Memories (Volume 1) [Paperback]  (Author) Linda Pietenpol Kelley, Libby... (2012)
Wiki information Pietenpol:
The Pietenpol Air Camper is a simple parasol wing homebuilt aircraft designed by Bernard H. Pietenpol. The first prototype that became the Air Camper was built and flown by Pietenpol in 1928.
Bernard H. Pietenpol was an aircraft designer. Father of home built aircraft, Pietenpol was a self-taught mechanic who lived most of his life in the small community of Cherry Grove in southeastern Minnesota. His most well-known design, The Pietenpol...