(Form 655, [edition] Sept. 1929.) [Form for use in working problem described in Special publication 138, p. 191-192 and Special publication 145, p. 98-100.]
Notes:
(Form 655, [edition] Sept. 1929.) [Form for use in working problem described in Special publication 138, p. 191-192 and Special publication 145, p. 98-100.] * For Sale by Superintendent of Documents. Paper, 5c.
Availability:
* For Sale by Superintendent of Documents. Paper, 5c.