Hyman, Libbie Henrietta.
The Invertebrates: Platyhelminthes and Rhynchocoela the Acoelomate Bilateria / - 1st ed / - New York : McGraw-Hill Book Company , 1962 - p.550 :
07-031661-9
K1 / J1;1
The Invertebrates: Platyhelminthes and Rhynchocoela the Acoelomate Bilateria / - 1st ed / - New York : McGraw-Hill Book Company , 1962 - p.550 :
07-031661-9
K1 / J1;1