update readme wrt doi links to data

Author: twhiteaker

README.md

@@ -71,8 +71,7 @@ presence of particular tags.
   to your LTER site, indicating whether the item is a foundational paper for the
   site (`Fondational`), was funded by the site (`LTER-Funded`), or was written by someone outside of your site
   who used your site's data (`LTER-Enabled`). If an item has one of the tags
-  you specify, the tag will be shown in the `ShowTags` column. Obviously, if you
-  want to use this functionality, make sure the text `ShowTags` is included in
+  you specify, the tag will be shown in the `ShowTags` column. To use this functionality, make sure the text `ShowTags` is included in
   `includeCols`.
 * `showTagColName` - The name to be used for the `ShowTags` column in the
   results table, since I can't predict what kind of categories your tags
@@ -81,6 +80,15 @@ presence of particular tags.
 * `style` - The bibliography display style for the citations, e.g., apa. Leave
   blank for the default which is chicago-note-bibliography.
 
+You can also supply links to datasets that the publication references by
+placing each dataset's DOI (with https://doi.org/ in front of it) on its own
+line in the **Extra** field in Zotero, as in:
+
+```bash
+https://doi.org/10.18739/A2GX44T8M
+https://doi.org/10.18739/A2MP4VN1H
+```
+
 ### Result Counts and Pagination
 
 You can provide HTML id attribute values for elements that will contain result