2 literature references for Poecilasma inaequilaterale Pilsbry, 1907:

Author:
Year: 2004
Title:
Source: pre-press, American Fisheries Society Special Publication 31
Author: Pilsbry, Henry A.
Year: 1907
Title: The barnacles (Cirripedia) contained in the collections of the U. S. National Museum
Source: Smithsonian Institution, United States National Museum Bulletin, no. 60