Mikrocensus 1991, 1. quarter: Extended Housing Survey, Environment
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The special survey in March is on the topic of extended housing survey ("Erweiterte Wohnungserhebung"), just as in the previous years (MZ9001, MZ8901, MZ8801, ...). In addition,...
3月开展的专项调查主题为扩展住房调查（Erweiterte Wohnungserhebung），与往年的MZ9001、MZ8901、MZ8801等系列调查保持一致。此外，……
