00253nam a22001097a 4500020001500000100001900015245002700034250001600061260004000077942000700117999001900124  a0811477606  aNORMAN F SMITH  aENERGY AND ENVIRONMENT  a3RD EDITION  aTEXASbSTECK-VAUGHN COMPANYc  1974  cBK  c252216d252215