Evitt, William R Dinoflagellate cysts and thecae / William R. Evitt and Susan E. D avidson. - Stanford : Stanford University, 1964. - 12 p. : ill., plates ; 25 cm. - Dinoflagellate Studies Vol. X ; no.1 . Includes bibliographical references. Subjects--Topical Terms: Dinoflagellate, Fossil.--------Gonyaulax.--------