Roth B.

Polygyrid land snails, Vespericola (Gastropoda: Pulmonata), 4. A new and possibly extinct species from central California, U.S.A.

. Zootaxa [Internet]. 2003 Jun. 18 [cited 2025 May 3];215(1):1–6. Available from: https://www.mapress.com/zt/article/view/zootaxa.215.1.1