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The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1910)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1911)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1912)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1913)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1915)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1920)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1929)

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The naturalist in La Plata - Hudson, W. H. (William Henry), 1841 -1922 (Dutton, 1922)

The naturalist in La Plata - Hudson, W. H. (William Henry), 1841 -1922 (Chapman and Hall, ld, 1892)

The naturalist in La Plata - Hudson, W. H. (William Henry), 1841 -1922 (J.M. Dent, 1922)

A naturalist in the Great Lakes region - Downing, Elliot Rowland, 1868 -1944 (University of Chicago Press, 1922)