00487nam a2200181Ia 450000500170000000800410001704000190005804100120007708200130008910000210010224500450012326000350016830000100020350400400021365000200025370000220027385000100029520240604105846.0131103s9999    xx            000 0 und d  aLoreto College  aEnglish  a570bLEO  aLeopold, Luna B.  aWatercLuna B. Leopold & Kenneth S.Davis  aU.S.AbTime incorporatedc1970  a191p   aIncludes bibilographical references  aGeneral science  aDavis, Kenneth S.  aLCBED