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