Source edit
- https://web.archive.org/web/20001215045500/http://www.gamecenter.com/Reviews/Item/0,6,0-4929,00.html
- https://apps.dtic.mil/dtic/tr/fulltext/u2/a382081.pdf
- https://archive.org/details/PC_Review_Issue_8_1992-06_EMAP_Images_GB/page/n31/mode/2up
- https://archive.org/details/game-players-pc-entertainment-vol.-7-no.-1-january-february-1994/page/n21/mode/2up
- https://archive.org/details/Computer_Gaming_World_Issue_105/page/n101/mode/2up?q=grigsby
- https://archive.org/details/Computer_Gaming_World_Issue_105/page/n111/mode/2up?q=grigsby
- https://archive.org/details/CGStrategyPlus_assorted/CG-StrategyPlus-25/page/n15/mode/2up?q=carrier
- https://archive.org/stream/Electronic-Games-1992-12/Electronic%20Games%201992-12#page/n53/mode/2up
- https://archive.org/details/Pcmania27/page/n15
- https://archive.org/stream/Computer_Gaming_World_Issue_125/Computer_Gaming_World_Issue_125#page/n293/mode/2up/search/gary
- https://archive.org/stream/Computer_Gaming_World_Issue_198/Computer_Gaming_World_Issue_198#page/n187/mode/2up/search/gary
- https://archive.org/details/game-players-pc-entertainment-vol.-7-no.-1-january-february-1994/page/n21/mode/2up
- https://archive.org/details/GPPCEVol6No1/page/n63/mode/2up
- https://archive.org/stream/CGStrategyPlus_assorted/CG-StrategyPlus-27#page/n31/mode/2up
- https://archive.org/stream/Computer_Gaming_World_Issue_198/Computer_Gaming_World_Issue_198#page/n187/mode/2up/search/gary