00377nam a2200145Ia 4500008004100000020001900041041000800060082001500068100003800083245005100121250001100172260002600183300000900209650001300218251222s2020    xx            000 0 und d  a97807020749336  aeng  a610.72 POL  aPolgar, Stephen and Thomas, Shane  aIntroduction to research in the health science  a7th ed  aPolandbElsvierc2020  a213p  aResearch