Gass, I. G. (Ian Graham),  1926- <br/><br/>
Geochemical analysis ( motion picture) / 
Open University ; speakers: I. G. Gass, J. B. Wright, R. S. Thorpe 
 - Milton Keynes :  The Open University Press,  1974 
 - 1 film reel (22 min.) :  sd., b&w. ; 16 mm. + notes 
<br/><br/> Professor I. G. Gass introduces the programme by defining geochemistry briefly as the chemistry of the earth, emphasizing that the only material availablefor direct is what we can obtain actually on the surface and from mines and boreholes  Backup in U-matic  Bahan rosak (Lupus) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geochemistry