F. A. Sviribov,International Conference onf the Role of Patent Information in the Transfer of Technology.International Conference on the Role of Patent Information in the Transfer of Technology (1980 : Varna)：the role of patent information in the transfer of technology.Pergamon,1981.
International Conference on the Role of Patent Information in the Transfer of Technology (1980 : Varna)：the role of patent information in the transfer of technology
F. A. Sviribov,International Conference onf the Role of Patent Information in the Transfer of Technology.Pergamon,1981.
