Digest of environmental regulations pertinent to open pit mining in Canada 
/ Mining Research Laboratories 
 - Canada:    Mining Research Laboratories,     1975 
 - 54p. 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Subjects--Index Terms: </label>Environment  
<br/><br/><label>Universal Decimal Class. No.: </label>622.27  / L6