Somsak Panha. 1997. Taxonomy and karyotype of land pulmonate snails of Thailand. Bangkok:Faculty of Science Chulalongkorn University;
Somsak Panha. (1997) Taxonomy and karyotype of land pulmonate snails of Thailand. Faculty of Science Chulalongkorn University:Bangkok.
Somsak Panha. Taxonomy and karyotype of land pulmonate snails of Thailand. Bangkok:Faculty of Science Chulalongkorn University, 1997. Print.
Somsak Panha. (1997) Taxonomy and karyotype of land pulmonate snails of Thailand. Faculty of Science Chulalongkorn University:Bangkok.