1. Die Praxis des Osthandels;Steffens,1973
2. Pakistan's Trade with Eastern Bloc Countries;Kidron,1972
3. The Reincarnation of Barter Trade as a Marketing Tool;Kaikati;J. Market.,1976
4. Coping With Material Shortages;Monczka;J. Purchasing,1974
5. The Industrial Purchasing Decision from the Marketer's Viewpoint;Bird,1975