
Ugljen i njegova važnost za našu narodnu privredu
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- Yellowed pages
- Library stamp
- Traces of patina

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The work was originally published in 1959 and was awarded the first prize for the promotion of literature for children and young people in 1960 and has been translated into several languages. As a follow-up, Rackwitz wrote "Sunken Worlds - Far S
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This book is intended for those who do not have time to study history textbooks.