United States. Bureau of Standards. (1939). Interchangeable ground-℗Ưglass joints, stopcocks, and stoppers, a Recorded standard of the industry, fourth edition. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Standards. Interchangeable Ground-℗Ưglass Joints, Stopcocks, and Stoppers, a Recorded Standard of the Industry, Fourth Edition. [Washington]: [s.n.], 1939.
MLA (9th ed.) CitationUnited States. Bureau of Standards. Interchangeable Ground-℗Ưglass Joints, Stopcocks, and Stoppers, a Recorded Standard of the Industry, Fourth Edition. [s.n.], 1939.
Warning: These citations may not always be 100% accurate.