Contents: A.G. Gonzalez and J. Bermejo Barrera: Chemistry and Sources of Mono- and Bicyclic Sesquiterpenes from Ferula Species. - G. Prota: The Chemistry of Melanins and Melanogenesis. - H.J.M. Gijsen, J.B.P.A. Wijnberg, and Ae. de Groot: Structure, Occurrence, Biosynthesis, Biological Activity, Synthesis, and Chemistry of Aromadendrane Sesquiterpenoids. The volumes of this classic series, now referred to simply as "Zechmeister after its founder, L. Zechmeister, have appeared under the Springer Imprint ever since the series inauguration in 1938. The volumes contain contributions on various...