(Technical publication 4.) [Text and other illustrations on p. 1-4 of cover.]
Notes:
(Technical publication 4.) [Text and other illustrations on p. 1-4 of cover.] * For Sale by Superintendent of Documents. Paper, 10c. • Sent to Depository Libraries. Item 912
Availability:
* For Sale by Superintendent of Documents. Paper, 10c. • Sent to Depository Libraries. Item 912