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1by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar...”
Published 1938
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2by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar...”
Published 1938
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3by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar...”
Published 1938
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4by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1937
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5by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1937
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6by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1937
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7by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1937
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8by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1937
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9by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1938
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10by Field Museum of Natural HistoryContributors: “...Laybourne, Edgar; Walters, Leon...”
Published 1938
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11by Field Museum of Natural HistoryContributors: “...Walters, Leon; Laybourne, Edgar; Rueckert, Arthur...”
Published 1950
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12by Field Museum of Natural HistoryContributors: “...Walters, Leon; Laybourne, Edgar; Rueckert, Arthur...”
Published 1938
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13by Field Museum of Natural HistoryContributors: “...Walters, Leon; Laybourne, Edgar; Rueckert, Arthur...”
Published 1938
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