[Monthly except August and September. Text and illustrations on p. 2-4 of cover.]
Notes:
[Monthly except August and September. Text and illustrations on p. 2-4 of cover.] * For Sale by Superintendent of Documents. Paper, 10c. single copy, $1.00 a yr. (10 months); foreign subscription, $1.50.
Availability:
* For Sale by Superintendent of Documents. Paper, 10c. single copy, $1.00 a yr. (10 months); foreign subscription, $1.50.