00539cam a22002054a 450000100060000000300110000600500170001700800410003404000270007504100080010204400080011008000070011810000240012524500680014926000470021730000270026465000200029165000120031165500100032336708AR-SsjUBGM20251206161955.0250720s1931    xxu           000 0 eng d  aAR-SsjUBGMcAR-SsjUBGM0 aeng  axxu  a561 aLull, Richard Swann10aFossils :bwhat they tell us of plants and animals of the past.  aNew York :bThe University Society,c1931.  a114 p. :bil. ;c23 cm 4aPaleontología 4aFósil 4aLibro