Weerathep Pongprasert. 2000. Phylogenetic relationships of the bumblebees (Apidea : Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences. , Oregon State University;
Weerathep Pongprasert. (2000) Phylogenetic relationships of the bumblebees (Apidea : Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences . Oregon State University/Oregon.
Weerathep Pongprasert. Phylogenetic relationships of the bumblebees (Apidea : Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences. . Oregon:Oregon State University, 2000.
Weerathep Pongprasert. (2000) Phylogenetic relationships of the bumblebees (Apidea : Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences . Oregon State University/Oregon.