TY  - BOOK
ED  - Bureau of Indian Standards                                                                                                                                                                                                                                     . 
TI  - Specification for hollow clay tiles for floors and roofs 3951(part II)-1975 / 
U1  - 691.42 
PY  - 1989///
CY  -  : 
PB  - Bureau of Indian Standards , 
ER  -