Author

Helga Demmer

2 books found

Cover of Mn Manganese

Mn Manganese

L.J. Boucher, Karl Koeber, Mirjana Kotowski, Dieter Tille, Edith Schleitzer-Rust, Helga Demmer, Ursula Hettwer · First published 2013

Cover of Der Kater Konstantin

Der Kater Konstantin

Walter Wippersberg, Helga Demmer · First published 1994