- Phelps, Humphrey,active 19th century,publisher.1
- Phelps, Lee R.1
- Public Roads Administration1
- Public Service Commission1
- R. Burger & Company.1
- Rand McNally and Company, engravers.1
- Raynolds, W. F. (William Franklin), 1820-18941
- Raynolds, W. F. (William Franklin), 1820-1894, surveyor1
- Reich, Peter B.1
- Risdon, Orange1
- Risdon, Orange, 1786-18761
- Robinson, Eugene1
- Roscommon County Road Commission1
- Rose, E.1
- Roser, C.1
- Russell, Israel C. (Israel Cook), 1852-19061
- S. Stiles & Co.1
- Saginaw County Metropolitan Planning Commission1
- Saint Clair County Road Commission1
- Saint Joseph County (Mich.)1