Gass, I. G.  1926- <br/><br/>
Volcanoes and volcanic rocks  [motion picture] / 
Open University ; speakers, Professor I. G. Gass, Dr. P. W. Francis 
 - 1 film reel (23 min.) :  sd., b&w. ;  16 mm. +  script 
<br/><br/> In the progrmme we look at a variety of volcanoes, Hawaii in the Pacific, Etna in the Mediterranean and two in Mexico, Popocatepetl & paricutin which is the most recently active volcano in that area  Backup available in U-matic 3/4 in.  Bahan rosak (Lupus) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Volcanoes.