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- Všeobecná didaktika / Erich Petlák. - [2. vyd.] - Bratislava : Iris, 2004 - 311 s. ISBN 80-8901-864-5 [1, currently available 0, at library only 1]
book
- Všeobecná didaktika / Erich Petlák - Bratislava : Iris, 1997 - 270 s. ISBN 80-88778-49-2 [1, currently available 1, Access to Shelves 1]
book