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- [23] Lawsonia intracellularis infection in pigs -: a permanent challenge for practice and research. DEUTSCHE TIERARZTLICHE WOCHENSCHRIFT, 2005, 112 (05): : 163 - +
- [25] Theory and practice of curriculum research. Methodological and practical approaches to research on learning processes ZEITSCHRIFT FUR PADAGOGISCHE PSYCHOLOGIE, 1997, 11 (3-4): : 228 - 231
- [30] PRACTICAL SIGNIFICANCE OF RECENT CARIES RESEARCH PROCEEDINGS OF THE ROYAL SOCIETY OF MEDICINE-LONDON, 1969, 62 (08): : 839 - &