-
1by Conference of Directors of UNESCO-sponsored Courses in the Basic Sciences, 3rd, Nice, France, 1975, French National Commission for UNESCOprogramme and meeting document bibliotecaUNESCO
-
2by Conference of Directors of UNESCO-sponsored Courses in the Basic Sciences, 3rd, Nice, France, 1975, French National Commission for UNESCOprogramme and meeting document bibliotecaUNESCO