osm7Vxy
hierarchical chain (BT): o os osm osm7 osm7V osm7Vx
o
os
osm
osm7
osm7V
osm7Vx
subclasses
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ILC 1 class details — ISKO Italia <http://www.iskoi.org/ilc/1/details.php> : 2011.07.15 - 2011.07.18 -