TY - EJOUR T1 - Reference Methods for the Determination of Sodium, Potassium, pH and Blood Gases with Ion-Selective Electrodes AU - Külpmann, W. R. PY - 1991 LA - und PB - Kooperation de Gruyter JO - Clinical Chemistry and Laboratory Medicine DO - 10.1515/cclm.1991.29.4.263 ER -