00289nam a2200109Ia 450000500170000000800410001708200150005810000200007324500360009326000420012930000080017120260225050917.0260224s9999||||xx |||||||||||||| ||und||  a561.14 ARN  aChester Arnold  3aAn introduction to paleobotany   aNew York: McGraw-Hill Book Co. c1947  a433