Description
Published:Vol. 1 (May 1951)-
Physical Description:v. ; 23 cm
Publication Frequency:Bimestral.
ISSN:00219916
Finding Aid:Vol. 1-6 (1951-1956) en v. 6; vol. 1-10 (1951-1960) en v. 11; vol. 1-18 (1951-1968) en 1 v.