Titlebook: Die moderne Stanzerei; Ein Buch für die Pra Eugen Kaczmarek Book 1923 Springer-Verlag Berlin Heidelberg 1923 Buch.L?sung.L?sungen.Moderne.P

CYT

ATP861

Use of Sentinel Systems in the Evaluation of the Impact of AIDS and HIV Infectionlity and their comparability between countries or parts of countries (Holland, 1988). Morbidity data for the general population are generally lacking while the use of morbidity data from hospitals is difficult since the corresponding population is unknown, the so-called denominator problem.