Description
Published:v. 1- Jan. 1921-
Physical Description:v. ill. 26 cm.
Available on microfilm from University Microfilms.
Publication Frequency:Annual, 1991-
Bibliography:Bibliography included in each number.
ISSN:0003-5815
Finding Aid:General index: Vols 1-10. 1 v.; vols. 21-30, 1941-50. 1 v.; vols. 31-40, 1951-60. 1 v.