Survey on the scientific and technical potential of the countries of Africa =
Survey on the scientific and technical potential of the countries of Africa = Enquêtes sur le potentiel scientifique et technique des pays d'Afrique.
- París : UNESCO, 1970.
- 296 p.
OC 5:6. 001.5 (6) =20=40 SUR.
OC 5:6. 001.5 (6) =20=40 SUR.