Tham khảo Passerculus sandwichensis

Tài liệu tham khảo

WikiPedia: Passerculus sandwichensis http://www.sararegistry.gc.ca/species/speciesDetai... http://www.birds.cornell.edu/AllAboutBirds/BirdGui... http://www.birds.cornell.edu/clementschecklist/dow... http://si-pddr.si.edu/dspace/bitstream/10088/6535/... http://sora.unm.edu/sites/default/files/journals/c... http://www.mbr-pwrc.usgs.gov/id/framlst/i5420id.ht... http://vireo.acnatsci.org/search.html?Form=Search&... http://www.cooper.org/COS/107_1/107_1abs02.pdf //doi.org/10.1650%2F7550 //doi.org/10.2307%2F1361136