Polyclad flatworms of the Pacific Coast of North America : Additions and corrections
Hyman, Libbie H.
Polyclad flatworms of the Pacific Coast of North America : Additions and corrections - New York 1955 - 11 p. - No. 1704 American Museum Novitates .
Flatworms
Polyclad flatworms of the Pacific Coast of North America : Additions and corrections - New York 1955 - 11 p. - No. 1704 American Museum Novitates .
Flatworms