| Type |  Book |
| ชื่อเรื่อง | Information systems : their interconnection and compatibility: proceedings of ... Varna, Bulgaria, 30 September-3 October 1974 / organized by the International Atomic Energy Agency, Food and Agriculture Organization of the United Nations, and the United Nations Education, Scientific and Cultural Organization |
| ผู้แต่ง | Symposium on Information Systems: Connection and Compatibility : [1974 : Varna] |
| พิมพลักษณ์ | Vienna : International Atomic Energy Agency, 1975 |
| รูปเล่ม | 470 p. : ill. ; 24 cm |
| หัวเรื่อง | Communication in science --Congresses [] |
| | Information services --International cooperation [] |
| | Information storage and retrieval systems --Science [] |