Artikel 9, p. 139-141 - Editie 3 - 1979
Onderwijs Ned Tijdschr Tandheelkd 86 (1979), maart on average 30 hours per person were spent per week on study activities: this is based on the period September 12., 1976 — June 18., 1977 including the Christmas- and Easter holidays; —under pressure, e.g. just before an examination, no more...
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