- EbookThe Feminist Bird Club's Birding for a Better WorldSydney Anderson
- EbookMammals of Mesa Verde National Park, ColoradoSydney Anderson
- EbookMammals of Mesa Verde National Park, ColoradoSydney Anderson
- EbookSubspeciation in the Meadow Mouse, Microtus pennsylvanicus, in Wyoming, Colorado, and Adjacent AreasSydney Anderson
- EbookMammals of the Grand Mesa, ColoradoSydney Anderson
- EbookThe Baculum in Microtine RodentsSydney Anderson
- EbookExtensions of Known Ranges of Mexican BatsSydney Anderson
- EbookSubspeciation in the Meadow Mouse, Microtus pennsylvanicus, in Wyoming, Colorado, and Adjacent AreasSydney Anderson
- EbookRecords of Harvest Mice, Reithrodontomys, from Central America, with Description of a New Subspecies from NicaraguaJ. Knox Jones
- EbookSubspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and ColoradoSydney Anderson
- EbookSubspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and ColoradoSydney Anderson
- EbookRecords of Harvest Mice, Reithrodontomys, from Central America, with Description of a New Subspecies from NicaraguaJ. Knox Jones
- EbookNeotropical Bats from Northern MexicoSydney Anderson
- EbookThe Baculum in Microtine RodentsSydney Anderson
- EbookSubspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and ColoradoSydney Anderson