1. Biochemical studies on the coelomic fluid of Nephtys hombergi (Polychaeta: Nephtyidae), with observations on changes during different physiological states;Clark;Biol. Bull,1964
2. Problems of interpreting neurosecretory phenomena in annelids;Clark;J. Endocrinol,1963
3. Endocrinology and the reproductive biology of polychaetes;Clark;Ann. Rev. Oceanog. Marine Biol,1965
4. Secretory activity in the nervous system;Clark,1966
5. The integrative action of a worm's brain;Clark,1966