Clasificación de la Biblioteca del CongresoQK5.R44
Obras Selectas (10,380 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