[Payments in Kind in the Educational Activities, Craft Training and School Actions in Bulgarian Lands during the Revival Period and in the First Decades of the 20th Century. Notes and Materials]
(2020)
[Матер. от] A Symposium presented at the 77 Annu. Meeting a. sponsored by the ASTM Standing Commitee on Publ., American Society for Testing a. Materials. Washington, D.C., 24 - 25 Jun. 1974
(1975)
