| nombre | tipo de medio | fecha | Autor | Idioma | tipo | Ubicación narrativa | Título |
|---|---|---|---|---|---|---|---|
| The Cold and the Dark: The World after Nuclear War | 1985 | Paul Ralph Ehrlich | |||||
| How to Know the Butterflies | 1960 | Paul Ralph Ehrlich | |||||
| Process of Evolution | 1963 | Paul Ralph Ehrlich | |||||
| Butterflies and Plants: A Study in Coevolution | 1964 | Paul Ralph Ehrlich | |||||
| The Population Bomb | 1968 | Paul Ralph Ehrlich |