Bob Sowder books & textbook
Model Aviation Magazine, January 2018 (Vol 44, No 1)
Bill Pritchett Elizabeth Helms Thayer Sime Joe Malinchak Matt Ruddick Jennifer Alderman Jimmy Cowman Bob Sowder Al Clark Troy Hamm Joe Haas George Kaplan Andrew Griffith Chris Mulcahy Jay Smith Jay Smith Larry Kruse Don Slusarczyk
AMA/The Academy of Model Aeronautics, Inc. /2018T Single Issue Magazine / 152 Pages
