Norris, Donald Kring,  1924- <br/><br/>
Structural conditions in Canadian coal mines. 

 - Ottawa,  E. Cloutier, Queen's printer,  1958. 
 - 54 p.  illus., maps, diagrs., table. 
<br/><br/> Part of illustrative matter folded in pocket. 
<br/><br/>Bibliograhy: p. 10-11. 
<br/><br/><label>LCCN: </label>gs 59000025  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Canada.
<br/><br/><label>LC Class. No.: </label>QE185  / .A43 no. 44