1. Estradiol-17β and progesterone in ovaries of starfish (Pisaster ochraceus);Botticelli,1960
2. Estrogens and progesterone in the sea urchin (Strongy-locentrotus franciscanus) and pecten (Pecten hericius);Botticelli,1961
3. Gonadal steroidogenesis in echinodenns;Colombo;Gen. comp. Endocr.,1976
4. Radioimmunoassays to determine the presence of progesterone and estrone in the starfish Asterias rubens;Dieleman;Gen. comp. Endocr.,1979
5. Occurrence of estrogens in the ovaries of certain marine invertebrates;Donahue;Endocrinology,1940