International Exhibition of the Works of Youth Inventors, Plovdiv 1985
現在展示： 保加利亞 - （通用）郵票 - 1985 - International Exhibition of the Works of Youth Inventors, Plovdiv - 3 郵票.
現在展示： 保加利亞 - （通用）郵票 - 1985 - International Exhibition of the Works of Youth Inventors, Plovdiv - 3 郵票.
![[International Exhibition of the Works of Youth Inventors, Plovdiv, 類型 DRL]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DRL-s.jpg)
![[International Exhibition of the Works of Youth Inventors, Plovdiv, 類型 DRM]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DRM-s.jpg)
![[International Exhibition of the Works of Youth Inventors, Plovdiv, 類型 DRN]](https://www.stampworld.com/media/catalogue/Bulgaria/Postage-stamps/DRN-s.jpg)
