Esser, Gerard,  1882- <br/><br/>
Theologia naturalis in usum scholarum. 

 - Techny, Ill.,  Typis Domus Missionum ad St. Mariam,  1949. 
 - 270 p. 
<br/><br/><label>LCCN: </label>ltf90013224  
<br/><br/><label>LC Class. No.: </label>4BX Cath 5020