Millar, Robert Hannay British ascidians, Tunicata : ascidiacea, keys and notes for the identification of the species - London : Academic Press, 1970. - 92p. : ill. ; 22cm. - Synopses of the British Fauna (New Series); 1 . Subjects--Topical Terms: Ascidiacea Great BritainIdentification LC Class. No.: PAM QL391.O4S9 no.1