509.47 Giu C Giurescu, ConSctantin C Contributions to the history of Rormanian science and technique from the 15th. to the early 19th. century. [Tr. by Maria Farca. Bucharest] Editura Academiei Republicii Socialista Romania, 1974 226 p.ilus. 21 cm. (Bibliotheca historica romaniae, 50. Economic history section Studies, 6) Notas bibliográficas al pie de las páginas