00261nam a2200109Ia 4500008004100000082001900041100000900060245002400069250001200093260003800105300000800143240913s9999||||xx |||||||||||||| ||und||  aREFBOT591  NAT  aNULL 0aNature Encyclopedia  a1st Ed.  bGeorge Philip LimitedaNULLc1992  a376