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"OPAS: An Office Procedure Automation System."
Vincent Y. Lum, David M. Choy, Nan C. Shu (1982)
- Vincent Y. Lum, David M. Choy, Nan C. Shu:
OPAS: An Office Procedure Automation System. IBM Syst. J. 21(3): 327-350 (1982)
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