Description
Published:Began with Oct.-Dec. 1977.
Item Description:Supt. of Docs. class no. for cumulation issues is: EP 1.21/7-2:
Description based on: Jan.-Mar. 1979.
Physical Description:v. ; 28 cm.
Some v. issued also to depository libraries in microfiche.
Publication Frequency:Quarterly, with sexennial cumulations
ISSN:0196-0091
0196-0083
Finding Aid:Fourth quarterly issue includes annual cumulative indexes.