00304nam a22000977a 4500020001600000082001500016100001800031245009700049260005100146300000900197  a00442023189  a547.12 ENT  aEntwistle, N.  aOrbital Symmetry Correlations in Organic Chemistry: A Guide to the Woodward- Hoffmann Rules/  aLondon:bVan Nostrand Reinhold Company,c1972.  a60p;