Instructions for testing lines, batteries, and instrument and guide to the technical arrangement of telegraph offices in India  / 
edited by Louis Schwendler 
 - Calcutta :  Govt. Telegraph press  1978 
 - v [7] p. of paltes ;  ill . ;  25 cm. 
<br/><br/> Library has vol.2 and 2 cops 
<br/><br/><label>Dewey Class. No.: </label>621.383