Antonov Todorov, T., Draganova, A., Hays, D. Introducing the Bulgarian Black Sea Coast. Varna: Higher Institute of Nat. Economy D.Blagoev-Varna, 1972 198 p.
Antonov Todorov, T., Draganova, A., Hays, D. Introducing the Bulgarian Black Sea Coast. Varna: Higher Institute of Nat. Economy D.Blagoev-Varna, 1972 198 p.
Antonov Todorov, T., Draganova, A., Hays, D. (1972) Introducing the Bulgarian Black Sea Coast, Varna: Higher Institute of Nat. Economy D.Blagoev-Varna 198 p.
Antonov Todorov, T., Draganova, A., & Hays, D. (1972). Introducing the Bulgarian Black Sea Coast. [Учебно пособие за студентите от ВИНС Д. Благоев - Варна]. Varna: Higher Institute of Nat. Economy D.Blagoev-Varna, 198 p.
Antonov Todorov T, Draganova A, Hays D. Introducing the Bulgarian Black Sea Coast: [Учебно пособие за студентите от ВИНС Д. Благоев - Варна]. Varna: Higher Institute of Nat. Economy D.Blagoev-Varna; 1972. p. 198 p.