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- [1] COMPARISON AND EVALUATION OF BIDS OF VARIOUS MANUFACTURERS OFFICE COMMUNICATIONS, PTS 1 AND 2: PT 1: INTRODUCTION OF NEW OFFICE TECHNOLOGY, REQUIREMENT AND REALITY, PT 2: SELECTION OF TECHNOLOGY FOR OFFICE COMMUNICATIONS, THE VDI MODEL AS A DECISION-MAKING AID, 1989, 790 : 175 - 192
- [7] Bids and bonds ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND AIR-CONDITIONING ENGINEERS, 1998, : 37 - 39