[Published each month of the school year, Oct. through June. Text and illustrations on p. 2-4 of covers. An index to v. 31, Oct. 1948-June 1949 and March supplement also issued.]
Notes:
[Published each month of the school year, Oct. through June. Text and illustrations on p. 2-4 of covers. An index to v. 31, Oct. 1948-June 1949 and March supplement also issued.] * For Sale by Superintendent of Documents. Paper, $1.00 a yr.; 50c. additional for foreign mailing; single copy, 10c. • Sent to Depository Libraries. Item 370
Availability:
* For Sale by Superintendent of Documents. Paper, $1.00 a yr.; 50c. additional for foreign mailing; single copy, 10c. • Sent to Depository Libraries. Item 370