Check the listing for details. 1979 EAA OSHKOSH Convention Program 27th Annual Wittman Field VTG Aviation Flyin. Condition: Used. Listed at 5.00 USD. Location & Date: Wittman Field - Oshkosh, Wis. | July 28 - August 4, 1979. Front Cover: Aerial view of the massive convention grounds, aircraft, and crowds at Wittman Field. Title/Event: OSHKOSH '79 EAA - 27th Annual International Sport Aviation Convention & Exhibition.