00836nam0-22003131i-450-99000201986040332120021010000201986FED01000201986(Aleph)000201986FED0100020198620021010d--------km-y0itay50------baitaPresent problems about the past.Walter AuffenbergBostonAmer. Inst. Biol. Sc.196335 p.20 cmBSCS Pamphlets6PaleozoologiaBiologia560.1Auffenberg,Walter85630ITUNINARICAUNIMARCBK99000201986040332161 II B.5/31.62078DAGENDAGENPresent problems about the past405118UNINAING01