Statistical digest : a statistical summary of data on education, science and technology, culture and communication, by country.
Statistical digest : a statistical summary of data on education, science and technology, culture and communication, by country.
- París : UNESCO, 1981.
- xv, 323 p. : fot.
9231019945
OC 31(100) =20 "1981" UNE.
9231019945
OC 31(100) =20 "1981" UNE.