ASAE President Robert Gustafson (l) and Bill Roberts in front of the first air-inflated double-layer polyethylene greenhouse. Photograph by Alan Goldsmith.

ASAE President Robert Gustafson (l) and Bill Roberts checking the inflation pressure of the film installed on the first air-inflated double-layer polyethylene greenhouse. Photograph by Alan Goldsmith.

Cook College Acting Executive Dean Keith Cooper (l), Bill Roberts (c), and ASAE President Robert Gustafson (r) after the official unveiling of the commemorative ASAE Landmark dedication plaque. Photograph by Alan Goldsmith.

Group photograph including attendees of the dedication event. Photograph provided by Merle Jensen.

Bill and Dottie Roberts. Photograph by Merle Jensen.