**Steps to reproduce**
# Generate citation from "80-86596-08-7"
**Expected behavior**
Since this is ISBN and no open access online version of the book is available, the Url parameter (produces "available online" link) should not be filled.
**Current behavior**
Citoid incorrectly fills Url parameter with urls to worldcat.org database.
**Configuration**
Czech Wikipedia, [[https://cs.wikipedia.org/w/index.php?title=Lb%C3%A1n%C4%9B&oldid=18448166|example edit]], [[https://cs.wikipedia.org/wiki/Wikipedie:Pod_l%C3%ADpou_(technika)#Citace|Village Pump report]]
French Wikipedia, [[https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Le_Bistro/29_mai_2022#c-Whatamidoing_(WMF)-2022-05-30T23:29:00.000Z-Zyth%C3%A8me-2022-05-29T17:38:00.000Z|Bistro report]], [[https://www.mediawiki.org/wiki/Topic:Wwhx1qo13j72jzjc|mw.org note]]