Category:Articles using GVP links in vnum format

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The Global Volcanism Program (GVP) uses a new link format. This category lists all pages that use {{cite gvp}} with the old format. The gvp template has been updated so that it can handle transclusions using the old parameter and create links using the new format. But we should still update them when possible.

How to fix: replace the vnum= with vn= in the transclusion.