Engineering product design  case study  Block 4.  Self-advancing mine support 
[Engineering Product Design Course Team] 
 - Milton Keynes  Open University Press  1984 
 - 44 p.  ill.  30cm 
<br/><br/> At head of title: The Open University 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering design
<br/><br/><label>Dewey Class. No.: </label>620  / .00425