New Helvetic Society. (1957). Switzerland, present and future 1963. Berne: Conference of Cantonal Directors of Education.
Styl ChicagoNew Helvetic Society. Switzerland, Present and Future 1963. Berne: Conference of Cantonal Directors of Education, 1957.
Citace podle MLANew Helvetic Society. Switzerland, Present and Future 1963. Berne: Conference of Cantonal Directors of Education, 1957.
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