GEOGRAPHICAL ECOLOGY AND EVOLUTION OF 3-TOED WOODPECKERS, PICOIDES-TRIDACTYLUS AND PICOIDES-ARCTICUS

[1] [Anonymous], 1887, GEOGRAPHICAL GEOLOGI

[2] BALDWIN P. H., 1968, Proceedings. North Central Branch, American Association of Economic Entomologists, V23, P90

[3] BANGS O, 1900, AUK, V17, P126

[4] BLACKFORD JOHN L., 1955, CONDOR, V57, P28, DOI 10.2307/1364695

[5] BERING LAND BRIDGE - EVIDENCE OF SPRUCE IN LATE-WISCONSIN TIMES [J]. SCIENCE, 1967, 156 (3773) : 380 - +

[6] ENVIRONMENT OF BERING LAND BRIDGE [J]. ECOLOGICAL MONOGRAPHS, 1964, 34 (03) : 297 - &

[7] A POLLEN RECORD FROM ARCTIC ALASKA REACHING GLACIAL AND BERING LAND BRIDGE TIMES [J]. NATURE, 1963, 198 (488) : 609 - &

[8] COLINVAUX PAUL A, 1967, P207

[9] Gabrielson I. N., 1959, BIRDS ALASKA

[10] GABRIELSON IN, 1940, BIRDS OREGON

[1] [Anonymous], 1887, GEOGRAPHICAL GEOLOGI

[2] BALDWIN P. H., 1968, Proceedings. North Central Branch, American Association of Economic Entomologists, V23, P90

[3] BANGS O, 1900, AUK, V17, P126

[4] BLACKFORD JOHN L., 1955, CONDOR, V57, P28, DOI 10.2307/1364695

[5] BERING LAND BRIDGE - EVIDENCE OF SPRUCE IN LATE-WISCONSIN TIMES [J]. SCIENCE, 1967, 156 (3773) : 380 - +

[6] ENVIRONMENT OF BERING LAND BRIDGE [J]. ECOLOGICAL MONOGRAPHS, 1964, 34 (03) : 297 - &

[7] A POLLEN RECORD FROM ARCTIC ALASKA REACHING GLACIAL AND BERING LAND BRIDGE TIMES [J]. NATURE, 1963, 198 (488) : 609 - &

[8] COLINVAUX PAUL A, 1967, P207

[9] Gabrielson I. N., 1959, BIRDS ALASKA

[10] GABRIELSON IN, 1940, BIRDS OREGON