Birds; a miscellaneous collection of 37 pamphlets about birds ⬇️

v.p., 1910-1913

The itinerary of John Jeffrey an early botanical explorer of western North America ⬇️

S.l.: s.n., 1897?

Bulletin of the Biological Society of Washington ⬇️

revista científica

Proceedings of the Biological Society of Washington ⬇️

revista científica