What has the author Robert G Gregory written?

Donald J. Gregory has written:

'The DMS II primer'

'The B6700 WFL primer' -- subject(s): Burroughs B6700 (Computer), Programming

'The complete CANDE primer' -- subject(s): Burroughs B6000 series (Computers), Burroughs B7000 series (Computers), CANDE (Computer program language), Programming