Kako žive životinje

Egzotične ptice

Život životinja

Ptice Vukovarsko-srijemske županije

Text in Croatian, English and Hungarian.

Zemlja - tajanstven planet

Sometimes, however, even scientists grope in the dark because the Earth does not easily reveal all its remaining secrets. Reality, as it often happens, is more exciting than any novel.

Mladost za mlade: Akvarij

This book is dedicated to aquaristics, i.e. the breeding and care of aquarium fish and plant life in an aquarium.