Tough, John M. <br/><br/>
Passenger conveyors:  an innovatory form of communal transport/ 
John M. Tough and Coleman A. O'Flaherty 
 - London:  Jan Allan,  c1971 
 - 176 p.:  ill., charts, plates;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>711001898  Rs. 66.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Passenger conveyors<br/>Transportation--Passenger traffic<br/>Conveying machinery
<br/><br/><label>Dewey Class. No.: </label>621.867