Standardization of roadside counts of columbids in Puerto Rico and on Vieques Island
By: by Frank F. Rivera-Milán
Contributors: National Biological Survey (U.S.)
Series: Resource publication -- 197; Resource publication (National Biological Survey (U.S.)) -- 197
Publisher: U.S. Dept. of the Interior, National Biological Survey
Published: 1993
Place of publication: Washington, D.C
Language: eng
Format: Microform
Number of pages: 26
Subjects: Columbidae -- Counting -- Puerto Rico; Columbidae -- Counting -- Puerto Rico -- Vieques Island; Pigeons -- Counting -- Puerto Rico; Pigeons -- Counting -- Puerto Rico -- Vieques Island; Bird watching -- Puerto Rico
Notes: Distributed to depository libraries in microfiche

Shipping list no.: 94-0706-M

Includes bibliographical references (p. 24-26)

Microfiche. [Washington, D.C.?] : Supt. of Docs., U.S. G.P.O., [1994] 1 microfiche : negative