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 ↑ 622.3               mining special minerals         ≈ 8Cmin    
 ↑ 622.33                    hydrocarbons excavation         → 338.2728       

 
See also:

 ↑ 338.2728                    oil economics  → 622.33  915.6 
 ↑ 8Cmin                    special deposits of individual minerals    ≈ 622.3 

 

SciGator: explore University of Pavia libraries... — <http://scigator.unipv.it/indexe.php> : 2017.02.14 - 2024.11.12 -
« <http://www-dimat.unipv.it/biblio/dewey.php> : 2015.06.18 - 2017