* For Sale by Superintendent of Documents. Paper, $2.50 a yr., $1.00 additional for foreign mailing; single copy, 25c. • Sent to Depository Libraries. Item 423-A
Notes:
Jan.-June 1956; [v. 12, no. 1-6]. [1956.] Each [2]+28+[2], p. il. 4°
Availability:
* For Sale by Superintendent of Documents. Paper, $2.50 a yr., $1.00 additional for foreign mailing; single copy, 25c. • Sent to Depository Libraries. Item 423-A