Fourth worldwide survey by AIVC containing over 200 replies from 19 countries. Produced in two sections: an analysis in tabular form of survey results, followed by reproduction in full of research summaries and list of names and addresses of principal researchers.
Third worldwide survey by AIC, containing over 170 replies from 22 countries. Produced in two sections: an analysis in tabular form of survey results, followed by reproduction in full of research summaries, and appendix containing names and addresses of principal researchers. (Out of Print)
Second worldwide survey by AIC containing 149 replies from 20 countries. Produced in three sections: an analysis in tabular form of survey results, reproduction in full of research summaries, and details of projects completed since previous 1980 survey. Includes appendix of names and addresses of principal researchers.(Out of Print)