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 ↑ 628.5               pollution control techniques         → 363.7 628.16  ≈ S.SPEC.37.CF    
 ↑ 628.53                    air pollution             

 
See also:

 ↑ 363.7                    pollution, environmental concerns  → 304.2  344.046  628.5  632.95 
 ↑ 628.16                    analysis, treatment, countermeasures to pollution  → 363.7  628.5 
 ↑ S.SPEC.37.CF                    frauds, pollution, agricultural technology and industry    ≈ 628.5 

 

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