Nahapetian, Fr Gabriel  <br/><br/>
Two invariable and universal calendars and fixed Easter with 12 and 13 months ... 
Fr Gabriel Nahapetian.+ 
 - Venice :  San Lazzaro,  1923. 
 - 24 p. ;  26 cm. 
<br/><br/> Pub. by the Mekhitarist fathers, Island of San Lazzaro. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calendars