Earth materials  [computer file] / 
The Open University 
 - Milton Keynes :  The Open University,  2000 
 - 2 computer laser optical disks (CD-ROM) ;  col. :  12 cm + 1 workbook 
 - Discovering geology [computer file] .
<br/><br/> Contents: virtual crystals, properties of minerals, virtual lightbox, virtual crystals II 
<br/><br/><label>ISBN: </label>0749280972 (Block 2A) 0749280980 (Block 2B) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogy<br/>Geochemistry<br/>Petrology