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 ↑ 631.4               soil science         → 551.3   ≈ S.SPEC.40.EB    
 ↑ 631.41                    soil chemistry             

 
See also:

 ↑ 551.3                    surface processes, rock fall, landslides  → 624.151  631.4  ≈ `20D  `32E 
 ↑ S.SPEC.40.EB                    soil science    ≈ 631.4 

 

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