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 ↑ 23A               mining geology. Geology of hydrocarbons         ≈ 553.2    

 
See also:

 ↑ 553.2               hydrocarbons, fuels    ≈ `23A  `23D 

 

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