Rocks and minerals information, 1980. 

 - Ontario :    Ministry of Natural Resources,    1980. 
 - 24 p. :    30 cm. 
<br/><br/><label>ISBN: </label>07028164 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Petrology -- Bibliography.-- Ontario <br/> Minerology -- Bibliography.-- Ontario 
<br/><br/><label>Gov. Doc. Class. No.: </label>G.CAN/ NI (02) 1980/1