Author's A modern Spanish-English & English-Spanish technical &engineering dictionary, 1938: t.p. (R.L. Guinle)

A modern Spanish-English and English-Spanish technical and enginnering Dcictionary, 1969: t.p. (R.L. Guinle) portada

Biblioteca del congreso (Estados Unidos), 17 diciembre 2018: catálogo electrónico https://goo.gl/3mSVok