http://sportsturfonline.com/2014/02/27/drones-offe[...] | 12/08/2015 | | | |
http://read.dmtmag.com/i/251524/12 | 02/24/2014 | Adobe Flash | | Item is within a single large file |
http://sturf.lib.msu.edu/article/2014feb12b.pdf | 01/04/2014 | PDF Reader | | |
https://issuu.com/tgmdigital/docs/tgm115/16 | 07/13/2017 | Adobe Flash | | Item is within a single large file; TGM: Latinoamérica Spanish reprint; Variant pictures |