https://d.lib.msu.edu/gress/29/OBJ/view#page=24 | 07/07/2017 | PDF Reader | | Item is within a single large file |
https://listings.lib.msu.edu/gress/2003vol4.pdf#page=24 | 03/16/2017 | PDF Reader | | Item is within a single large file |
http://www.nga.no/assets/files/gressforum/gressfor[...] | 08/29/2018 | PDF Reader | | Item is within a single large file; Variant pictures; Gressforum reprint |