found: Work cat.: 2001032231: Gordon, J.F. Flying low : and shot down twice during World War II in a spotter plane, 2001.
found: Jane's encyc. of aviation:pp. 727-728 (Piper J-3 Cub, Piper J-4 Cub Coupé, Piper PA-11 Cub Special, Piper PA-18 Super Cub, Piper PA-19 Super Cub)
found: Bowers, P.M. Piper Cubs, 1993:p. xi (Between them the Taylor Aircraft Company and its successor, the Piper Aircraft Company, introduced 11 separately designated and certified 'Cub' models between 1930 and 1949 ... The last of them, the PA-18 Super Cub ... is still in production in 1992)