Geology and earth sciences sourcebook for elementary and secondary schools. 
ed. Robert Heller 
 - xv, 496p.--23cm. 
 - American Geological Institute. .
<br/><br/> Incluye: índices, apéndices  BIBLIOTECA: UACH-FING 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geologia
<br/><br/><label>Dewey Class. No.: </label>551.1  / GEO 1962