Cooper, Elmer L. (Nombre personal)

Agricultural mechanics, c1986: portada (Elmer L. Cooper, Ed. D.) pref. (assoc. prof. in agri. educ., Univ. of Md.)

Agriscience, c1990: portada (Elmer L. Cooper) data sheet (b. 1934)

Agriscience, 2000: portada (Elmer L. Cooper) pref. (deceased)

VIAF, sitio web, 21 mayo 2019: (puntos de acceso: Cooper, Elmer L.) https://viaf.org/viaf/66696440/#Cooper,_Elmer_L.