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Proceedings of the National Academy of Sciences of the United States of America Process Explorer Proceratophrys Procesa del Carmen Sarmiento Proceratophrys boiei Proceno Procelsterna cerulea Proceratophrys bigibbosa Procellaria Proceratophrys brauniTài liệu tham khảo
WikiPedia: Proceedings_of_the_National_Academy_of_Sciences_of_the_United_States_of_America http://lccn.loc.gov/16010069 http://www.jstor.org/journals/00278424.html http://www.pnas.org/ http://www.pnas.org/content/by/year http://www.pnas.org/content/current //www.worldcat.org/issn/0027-8424 //www.worldcat.org/issn/1091-6490 //www.worldcat.org/oclc/43473694 https://clarivate.com/products/journal-citation-re... https://www.newspapers.com/clip/28043583/discovery...