URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
https://d.lib.msu.edu/gress/10/OBJ/view#page=607/10/2017PDF ReaderItem is within a single large file
https://listings.lib.msu.edu/gress/2013vol2.pdf#page=604/19/2017PDF ReaderItem is within a single large file
http://www.nga.no/assets/files/gressforum/gressfor[...]08/29/2018PDF ReaderItem is within a single large file; Gressforum reprint