study on ‘self-help of groups for timber constructions’

study on ‘self-help of groups for timber constructions’ (German: ‘Gruppenselbsthilfe im Holzbau’), compiled in the pratice P.I.A. 1996-97, Karlsruhe, comissoned by the dfh-Siedlungsbau, supported by the German Minister for Building Affairs Prof. Klaus Töpfer