Scientific farm animal production, 1998: CIP t.p. (Thomas G. Field; Colorado State University)

Phone call to college, Mar. 19, 1997 (Thomas Gordon Field)

Scientific farm animal production, 2020: t.p. (Thomas G. Field) de portada

Biblioteca del congreso (Estados Unidos), 17 marzo 2020: Catálogo electrónico http://bit.ly/2QmxRV1