Specification for truck type concrete mixers :  BS 4251. 

 - London:   British Standards Institution,   1967.  
 - 15 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concrete
<br/><br/><label>Dewey Class. No.: </label>624.1834