Antzeko izenburuak: How to know the butterflies :
- Conservation biology of lycaenidae (butterflies) /
- Threatened swllowtail butterflies of the world /
- Swallowtail butterflies an action plan for their conservation /
- Photographic guide to the butterflies of Britain and Europe
- Photographic guide to the butterflies of Britain and Europe
- How to know the insects : an illustrated key to the more common families of insects, with suggestions for collecting, mounting and studying them /
Gaia: Mariposas
- Guía de mariposas : Universidad Nacional de Colombia, sede Medellín: campus El Volador /
- Mariposas : Sierra Nevada de Santa Marta /
- Reserva de la biósfera mariposa monarca : clima, fenología vegetal y conservación /
- Tina : la mariposa que soñaba ser un rinoceronte /
- Mariposas diurnas (Lepidoptera: Papilionoidea y Hesperioidea) del jardín botánico Alejandro von Humboldt de la Universidad del Tolima (Ibagué - Colombia) Butterfl ies (Lepidoptera: Papilionoidea y Hesperioidea) from the Alejandro von Humboldt botanical garden at the Universidad del Tolima (Ibagué - Colombia) /
- Photographic guide to the butterflies of Britain and Europe
Egilea: Ehrlich, Paul R.
- Población, recursos, medio ambiente : aspectos de ecología humana /
- Naturalezas humanas genes, culturas y la perspectiva humana
- Ecoscience: population, resources, environment
- Introducción a la biología /
- How to know the butterflies : illustrated keys for determining to species all butterflies found in North America, north of Mexico, with notes on their distribution, habits, and larval food, and suggestions for collecting and studying them /
- Población, recursos, medio ambiente : aspectos de ecología humana /