TY - BOOK TI - The elementary nervous system UR - https://www.biodiversitylibrary.org/item/17085 PB - J.B. Lippincott Company CY - Philadelphia PY - 1919 N1 - "The subject matter of the volume is drawn almost entirely from the three simpler phyla of the multicellular animals, the sponges, the clenterates and the ctenophores." AU - Parker, George Howard, KW - Coelenterata KW - Nervous system ER -