- Maddren, A. G1
- Mahlo, Emil1
- Marshall, R. B. (Robert Bradford), 1867-19493
- Marshall, R. B. (Robert Bradford), 1867-1949.1
- McDanal, M. R1
- McKinley, C. P1
- Monaldini, Venanzio1
- Monaldini, Venanzio, bookseller1
- Moon Street Cartography (Firm)1
- Moor, D. F.1
- Morris, F. L. (Fred Ludwig), 1873-1955. asn CU-BANC2
- New Zealand Geological Survey3
- Peale, A. C. (Albert Charles), 1849-19141
- Peele, William T1
- Peters, W. J. (William John), 1863-19421
- Philippines. Bureau of Science1
- Post, W. S1
- Pronti, Domenico, 1750- engraver1
- Reaburn, D. L1
- Robertson, R. B.1
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