00321nam a2200097Ia 4500008004100000082001700041100003400058245008800092260003500180300000800215140113s9999    xx            000 0 und d  a543.544   J8  a"Block, R.J. and Drrum, E.L."  aManual of paper chromatography and paper electrophoresis 2nd rev.& enlarged edition  a1958bAcademic PresscNew York  a710