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