Esser, Gerardo. Cosmologia in usum scholarum. Techny, IL: Typis Domus Missionum ad St. Mariam, 1939. First Edition. 
Very good green cloth hardcover, 23.5 x 15.2 cm (9 1/4 x 6 inches), small private ink name stamp on the ffep & tp, rest of book clean and unmarked, xix. + 357 pp. Very good. Hardcover.
Imprimatur: † Georgius Cardinalis Mundelein.
"Cosmology for the Use of Schools." The author writes from the Seminary of St. Mary, Techny, Illinois.