https://gsr.lib.msu.edu/article/hartwiger-ten-3-21[...] | 03/18/2014 | PDF Reader | | |
https://gsr.lib.msu.edu/article/hartwiger-ten-3-21[...] | 01/15/2015 | PDF Reader | | Spanish version |
https://gsr.lib.msu.edu/article/hartwiger-ten-3-21[...] | 01/15/2015 | PDF Reader | | Mandarin version |
https://issuu.com/tgmdigital/docs/tgm125 | 10/28/2015 | Adobe Flash | | Item is within a single large file; TGM: Latinoamérica Spanish reprint |
https://archive.lib.msu.edu/tic/cespe/article/2017[...] | 09/05/2018 | PDF Reader | | Item is within a single large file; Greenkeepers Spanish reprint; Variant pictures; Variant maps; Direct download |