Clasificación de la Biblioteca del CongresoQK31.S456
Obras Selectas (10,384 en total)
- National Audubon Society Field Guide to North American Wildflowers: Eastern Region por William A. Niering
- A Field Guide to Wildflowers of Northeastern and North-central North America por Roger Tory Peterson
- National Audubon Society Field Guide to North American Wildflowers: Western Region por Richard Spellenberg