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 ↑ 628.16                    analysis, treatment, countermeasures to pollution         → 363.7 628.5      

 
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 ↑ 628.5                    pollution control techniques  → 363.7  628.16  ≈ S.SPEC.37.CF 

 

SciGator: explore University of Pavia libraries... — <http://scigator.unipv.it/indexe.php> : 2017.02.14 - 2020.09.29 -
« <http://www-dimat.unipv.it/biblio/dewey.php> : 2015.06.18 - 2017.02.14