This preliminary evaluation of the answers to the IRG/WP-Questionnaire only gives a general survey on those questionnaires, which the author received until June 13, 1974. Details, such as correlations between importance of wood preservation and pollution control, could not be considered due to lack of time. For the same reason it was not possible so far, to evaluate the additional remarks given in seperate letters. In the case, where several questionnaires have been returned for one country, the respective answers were compared. If answers differed within one country, those were considered, which seemed to be most applicable. Obvious errors were omitted.

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