00309pam a2200121 a 4500020001700000041000800017082001300025100002100038245007200059260003600131300000800167653001200175  a071666061Xc  aeng  a000bWOR  aWorld Book, Inc.  aYoung Scientist : Looking at Structures Vol - 14hTextual Documents  aChicagobWorld Book, Inc.c1992  a62.  aGeneral