00401nam a2200145Ia 450000500170000000800460001703700120006304000210007504100130009608400190010910000220012824500460015026000470019630000120024320250508154404.0008  250505s9999    xx            000 0 eng d  aTextual  aFEDL bengcFEDL  aeng2eng  a414, ABEqFEDL  aAbercrombie David 0aProblems and principles in language study  aLondon, UKbLongmans, Green and Co. c1963  avii,83p