1. Reciprocity in Industrial Buying and Selling: A Study of Attitudes;Bird;Journal of Purchasing,1973
2. The Industrial Purchasing Decision from the Marketer's Viewpoint;Bird,1975
3. Time Reciprocity: A Possible Answer to Shortages;Bird;Journal of Purchasing and Materials Management,1974
4. Reverse Reciprocity: A New Twist to Industrial Buying Behavior;Bird;Atlanta Economic Review,1976
5. A Critical Review of Recent Organizational Buying Research;Ferguson;Industrial Marketing Management,1978