City spore concentrations in the European Economic Community (EEC) I. Grass pollen, 1973.

Although clinical reports on the prevalence of summer hay fever in different parts of Europe have been published, comparative studies on atmospheric pollen concentrations appear to have been rarely undertaken. The present paper describes observations on the grass pollen content of the air at Bologna, Brussels, London, Munich and Strasbourg and is the first of a series involving international collaboration between workers in cities of the European Economic Community.