00804nam0-22002771i-450-99000164488040332120050415095659.0000164488FED01000164488(Aleph)000164488FED0100016448820030910d1911----km-y0itay50------baitaOn a trenton echinoderm fauna at Kirkfield, OntarioFrank SpringerOttawaGovernment Printing Bureau191168 p., 5 tav.25 cmInvertebrati592Springer,Frank70721ITUNINARICAUNIMARCBK99000164488040332160 551 B 6114704FAGBCFAGBCOn a trenton echinoderm fauna at Kirkfield, Ontario372150UNINA