000 00318nam a2200073 4500
080 _a
_b
245 _aIS: 6061 (Part 1) - 1971; Code of practice for construction of floor and roof with joists and Filler blocks Part 1 with Hollow concrete filler blocks (Third reprint July 1990)
700 _aBureau of Indian Standards
260 _aNew Delhi
_bBIS
_c1971
300 _a11p
999 _c33500
_d33500