- National Highways Association, issuing body1
- Nicholson, W. L.1
- O.W. Gray & Son1
- Peirce, Benjamin, 1809-18801
- Posner, Alex1
- Rankin, Douglas W.1
- Rogers, Stanley M.1
- Sanborn Map Company, cartographer1
- Sanchez-Saavedra, E. M.1
- Scheel, Eugene M.1
- Scrivenor, Arthur1
- Seiders, Victor M.1
- Senex, John, -17401
- Shattuck, George Burbank, 1869-19341
- Sheppard, Edwin, cartographer1
- Smith, John, 1580-16311
- Speed, John, 1552?-16291
- Staunton Development Company1
- Stose, George Willis, 1869-19601
- Sweet, Palmer C.1
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