(1921). [X-ray technicians of Public Health Service designated as roentgenologists]. [publisher not identified].
Chicago Style (17th ed.) Citation[X-ray Technicians of Public Health Service Designated as Roentgenologists]. Washington, D.C.: [publisher not identified], 1921.
MLA (9th ed.) Citation[X-ray Technicians of Public Health Service Designated as Roentgenologists]. [publisher not identified], 1921.
Warning: These citations may not always be 100% accurate.