TY  - BOOK
AU  - Witt,P.J.
ED  - Symposium on Concrete Shell Roof Construction
ED  - Concrete Association of India (Bombay),
TI  - Concrete shell roof construction
U1  - 695.3 
PY  - 1954///
CY  - Bombay
PB  - Concrete Association of India
KW  - Roofs, Shell
KW  - Congresses
ER  -