000
00306nam a2200109Ia 4500
008
220201s1968 xx 000 0 eng d
100
_a
Indian Standard Institution Manak Bhawan
245
0
_a
IS:4570-1968 Specification for crystal holders
260
_b
ISI Manak bhawan
_c
1968
300
_a
29
942
_2
ddc
999
_c
76180
_d
76180