000
00251nam a2200109Ia 4500
999
_c
5620
_d
5620
100
_a
Das P N
245
_a
Introduction to Manual Telephony
250
_a
1
260
_c
1967
_b
MODERN BOOK AGENCY PVT. LTD.
_a
Calcutta
300
_a
ii+ii+138
942
_c
BK