Energlyn, William David Evans  Baron <br/><br/>
A través de la corteza terrestre 
Lord Energlyn. 
 - Mexico  Barcelona  Editorial Grijalbo  Ediciones Grijalbo  c1975. 
 - 126 p.  ill. (some col.), maps (some col.)  31 cm. 
<br/><br/> Translation of Through the crust of the earth, originally published in 1973.  Includes index. 
<br/><br/><label>ISBN: </label>8425305241  8425305225 (colección completa) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology