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Estimating the variances of ratio estimates in complex sample surveys with two primary sampling units per stratum—a comparison of balanced replication and jackknife techniques
Transfusionsgesetz (TFG) vom 1. Juli 1998 (BGBl. I S. 1752): Bestellung eines nicht institutionsangehörigen Transfusionsverantwortlichen–gutachterliche Stellungnahme