00724nam2 22002171i 450 990002256930403321000225693FED01000225693(Aleph)000225693FED0100022569320030801d--------km-y0itay50------ba<<The >>potency of the first two cleawagecells in the development of echinoderms.Englewood Cliffs, 1955, p. 210-214.001000220431Driesch,Hans93636ITUNINARICAUNIMARCBK990002256930403321FFABCPotency of the first two cleawagecells in the development of echinoderms.Englewood Cliffs, 1955, p. 210-214399463UNINAING01