Sources edit
- https://archive.org/stream/vgce_02/vgce_02#page/n75/mode/2up/search/gary
- https://archive.org/stream/inCider_86-05/inCider_86-05#page/n107/mode/2up/search/gary
- https://archive.org/details/Computer_Play_1989-01_Computer_Play_Magazine_US/page/n19/mode/2up
- Review in InCider
- http://amr.abime.net/amr_search.php?search=battle+group&mag_id=0&action=Find