Names
- Murfin, James Orin, 1875-1940.1
- Murphy, Frank, 1890-1949.1
- Musselman, Amos S., 1851-1
- National Gleaner Federation1
- National Milk Producers Federation1
- National Milk Producers Federation.1
- National Non-partisan League1
- National Nonpartisan League.1
- National Progressive Republican League1
- National Progressive Republican League.1
- Newberry, Truman Handy, 1864-1945.1
- O'Brien, Patrick H. (Patrick Henry), 1868-1959.1
- O'Brien, Patrick Henry, 1868-1
- O'Hara, John J., 1885-1
- Olds, Ransom Eli, 1864-1950.1
- Osborn, Chase S. (Chase Salmon), b. 1860.1
- Osborn, Chase Salmon, 1860-19491
- People's Legislative Service1
- People's Legislative Service.1
- People's Reconstruction League1