00426nam a22001457a 4500008004100000040005500041080001900096245004000115260003900155300001500194500001600209650001300225653001500238700002700253230802b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a539.143.43(05)  aAdvances in heterocyclic chemistry   aNew York: bAcademic Press, c1971  aix, 367p.   aVol. 5 1971  aScience   aChemistry   aKartritzky, A R (Ed.)