Titles
- [Ludvig Hektoen]3
- [Lungs and trachea]3
- [Major Baldwin, Educational Department, Walter Reed Hospital]3
- [Major M.W. Hale]3
- [Major William J. Mayo]3
- [Martin M. Cummings]3
- [Maurice Oppenheim]3
- [Max Josef von Pettenkofer]3
- [Max Rubner]3
- [Mazÿck P. Ravenal]3
- [Medical Instruments & Apparatus: Television used as a teaching aid]3
- [Medical Library Association]3
- [Mosquito in biting position]3
- [N. Chapman]3
- [NLM- Construction: Interior view public catalog]3
- [NLM- Exhibits and Publications]3
- [NLM- interior view, Reading Room]3
- [Nurses Uniform- Belgian]3
- [Nurses Uniforms]3
- [Occupational therapy]: [Nurse with patients]3