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 ↑ 627.5               land improvement and irrigation         → 631.5       
 ↑ 627.54                    drainage             

 
See also:

 ↑ 631.5                    cultivation and harvesting   → 627.5 
 ↑ BOI                    reclamation and irrigation    ≈ 627.5 
 ↑ CI2                    reclamation and irrigation    ≈ 627.5 
 ↑ ID2                    agricultural hydraulics    ≈ 627.5 

 

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