Manual de métodos de campo para el monitoreo de aves terrestres
By: C. John Ralph ... [et al.].
Contributors: Ralph, C. John.; Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
Series: General technical report PSW -- 159.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station
Published: 1997
Place of publication: Berkeley, CA
Language: spa
Number of pages: 44
Subjects: Birds -- Monitoring; Bird populations
Notes: "December 1996"--P. [2] of cover.

Includes bibliographical references (p. 42-44).