(Simplified practice recommendation R 90-29.) [Supersedes R 90-28. Title on cover is: Hack-saw blades, elimination of waste through simplified commercial practice. Recommendation became effective July 1, 1929.]
Notes:
(Simplified practice recommendation R 90-29.) [Supersedes R 90-28. Title on cover is: Hack-saw blades, elimination of waste through simplified commercial practice. Recommendation became effective July 1, 1929.] * For Sale by Superintendent of Documents. Paper, 10c.
Availability:
* For Sale by Superintendent of Documents. Paper, 10c.