Subject
- Manufacturing Chemists' Association (U.S.)1
- Manufacturing industries1
- Manzanar War Relocation Center1
- Maps1
- Margarine1
- Marketing1
- Maryland--Edgewood (Harford County)1
- Mass spectrometry1
- Materia medica1
- Materia medica, Vegetable1
- Materials science1
- Maxim, Hudson, 1853-19271
- Mayonnaise1
- Mayow, John, 1641-16791
- McAfee, Almer McDuffie, 1886-19721
- McDougall-Butler Co.1
- Measuring instruments1
- Meat1
- Meat--Analysis1
- Meat--Microbiology1