Laumer, Keith,
--A Short History of the Bolo Fighting Machines, 1976. (article)
--The Night of the Trolls, 1963. (novella) (Worlds of Tomorrow, October, 1963.)
--Courier, 1961. (novelette) (as The Frozen Planet, in If, September, 1961.)
--Field Test, 1976. (Analog, March, 1976.)
--The Last Command, 1966. (Analog, January, 1967.)
--A Relic of War, 1969. (Analog, October, 1969.)
--Combat Unit, 1960. (F & SF, November, 1960.) (aka Dinochrome)