Mckee, R.B. <br/><br/>
support a mountain: a case history in engineering design / -R.B. Mckee 

 - Los Angeles, Calif. : University of California, Department of Engineering 
 - 27 p. 
 - Report ; No. 6-64 .
<br/><br/> Contenido: Part I. Design and development of a "dynamic" mi-ne prop -- Part II.: First production design and field expe-rience -- Part III.: Modification and redesign -- Part IV. -The spanseal unloading valve: case history of a detail.