TY  - BOOK
TI  - Mechanical world yearbook
U1  - 621.058 
PY  - 1954///
CY  - London
PB  - Emmott & Co.
KW  - Mechanical engineering
KW  - Yearbook
N1  - Library has : 67th,73rd,74th,75th,77th,79yh year
ER  -