TY  - BOOK
AU  - Atherton, William H.
TI  - Conveyors and cranes : : including continuous elevators stackers, ship hoists, transporters and electric telphers
PY  - 1947///
CY  - London : 
PB  - Pitman & Sons, 
KW  - GRUAS
KW  - ELEVADORES
KW  - TRANSPORTADORES
ER  -