000
00269nam a2200109Ia 4500
008
220201s1961 xx 000 0 eng d
100
_a
Indian Standrard Institute
245
0
_a
Specification for blocuhoards-1659
260
_b
Delhi
_c
1961
300
_a
12
942
_2
ddc
999
_c
72692
_d
72692