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Atrichops+hesperius and Naturalists--Colorado and Animalia+%7C+Arthropoda+%7C+Insecta+%7C+Diptera+%7C+Athericidae by Cockerell%2C+Theodore+D.+A.+%28Theodore+Dru+Alison%29%2C+1866-1948%2C+author and Cockerell%2C+Theodore+D.+A.+%28Theodore+Dru+Alison%29%2C+1866-1948%2C+author from Undated
- UC Boulder