Description
Published:Began with: PGIE-2 (Mar. 1955); ceased with: Vol. IE-9, no. 2 (Dec. 1962).
Item Description:Description based on print version record.
Latest issue consulted: IE-9, number 2 (Dec. 1962).
Electronic resource.
Publication Frequency:Two issues yearly, May 1961-Dec. 1962
ISSN:0197-5706