机译:VOCALIZATIONS AND BILL MEASUREMENTS MAY RESOLVE SOME QUESTIONS ABOUT TAXONOMIC RELATIONSHIPS WITHIN THE FOX SPARROW COMPLEX
1328 49th Street, Sacramento, California 95819;
US. Fish and Wildlife Service, 2800 Cottage Way, W1916, Sacramento, California 95825;
The Institute for Bird Populations, P.O. Box 518, Petaluma, California 94953;