- Lithuanian National Council (U.S.)1
- Lizars, Daniel, 1760-18121
- Lobeck, A. K. (Armin Kohl), 1886-19581
- London Geographical Institute1
- Madureira Beça, José A. F. de1
- Makarova, V. M1
- Matthews-Northrup Works1
- Mejer, Johannes, 1606-16741
- Moll, Herman, -17321
- Mukhin, Major General1
- N. & S.S. Jocelyn (Firm)1
- Nantiat, Jasper1
- Naples (Italy). Ispettorato Risanamento e Fognatura1
- National Geographic Society (U.S.)1
- Państwowy Instytut Geologiczny (Poland)1
- Petrov, A. (Aleksei?), 1859-19321
- Pneu Michelin (Firm)1
- R. Wilkinson (Firm)1
- Ravenstein, Ludwig1
- Robert de Vaugondy, Didier, 1723-17861