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1996. Watada, Hiroyo & Keiji Wada. Arboreal Distribution of the Land Snail Euhadra amaliae. Venus 55(2): 123-137. Source - Edit
1998. Adachi, Naoko & Keiji Wada. Distribution of Two Intertidal Gastropods, Batillaria multiformis and B. cumingi (Batillariidae) at a Co-occurring Area. Venus 57(2): 115-120. Source - Edit
1998. Watada, Hiroyo & Keiji Wada. Tree-species Preference of the Arboreal Snail Euhadra amaliae. Venus 57(1): 29-37. Source - Edit
2003. Kuroda, Miki, Keiji Wada, Mahito Kamada, Kohei Suzukida & Hiroshi Fukuda. Distribution pstterns of assimineid species (Gastropoda: Rissooidea) in the salt marshes of the Yoshino River, Tokushina Pefecture, Japan. The Yuriygai 9(1): 21-31 Source - Edit
2008. Wada, K. and I. Tëmkin. Taxonomy and phylogeny. In P. C. Southgate & J. S. Lucas (eds.), The Pearl Oyster. Elsevier. Pp. 37-75. Source - Edit
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