17 books • 4 series
Book #1: The Music Master Theory Book One
Book #2: The The Music Master Theory Book Two
Book #37: Conservation of Marine Benthic Biocenoses in the North Sea and the Baltic
Book #42: Saproxylic Invertebrates and Their Conservation
Book #46: Conservation of threatened freshwater fish in Europe
Book #47: Status and conservation needs of the wolf (Canis lupus) in the Council of Europe member states
Book #52: Agriculture and the Environment
Book #2: The Music Master Keyboard Book
Book #3: The Music Master Composition Book
Book #3: The Music Master Composition
Book #3: Dilemmas