00663nam a2200217Ia 4500 CTU_152352 210402s9999 xx 000 0 und d 54.02 306.4409 B239 Barbour, Stephen Variation in German : A critical approach to German sociolinguistics Stephen Barbour, Patrick Stevenson Cambridge, England Cambridge University Press 1990 German language,German language,Sociolinguistics Variation,Social aspects pha Trung tâm Học liệu Trường Đại học Cần Thơ