Operation grizzly bear
Edición de la obra Operation grizzly bear
| Autor | Marian Calabro |
|---|---|
| Editorial | Four Winds Press |
| Fecha de publicación | 1989 |
| Lugar | New York |
| Idioma | inglés |
| Páginas | 118 |
| ISBN-10 | 0027162419 |
| LCCN | 88037497 |
| Número de Cutter | C141o |
Describes the thirteen-year-study of grizzly bears done by John and Frank Craighead in Yellowstone National Park, in which their use of the radio-tracking collar and other innovations added to the scope of human knowledge about the grizzly.