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 ↑ 553.2               hydrocarbons, fuels         ≈ 23A  23D    

 
See also:

 ↑ 23A               mining geology. Geology of hydrocarbons    ≈ 553.2 
 ↑ 23D               mining geology. Geology of fossil coals    ≈ 553.2 

 

SciGator: explore University of Pavia libraries... — <http://scigator.unipv.it/indexe.php> : 2017.02.14 - 2024.11.12 -
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