complied by the Beilstein-Institut fur Literatur der Organischen Chemie Frankfurat am Main.Beilstein handbook of organic chemistry．4th ed. ，collective indexs. fifth supplementary series：covering the literature from 1960 through 1979;compounds-name index for volumes 17-19:N-Z.Springer-Verlag,1990.
Beilstein handbook of organic chemistry．4th ed. ，collective indexs. fifth supplementary series：covering the literature from 1960 through 1979;compounds-name index for volumes 17-19:N-Z
complied by the Beilstein-Institut fur Literatur der Organischen Chemie Frankfurat am Main.Springer-Verlag,1990.
