edited by D.A. Bond, G.T. Scarascia-Mugnozza and M.H. Poulsen, sponsored by the Commission of the European Communities, Directorate-General for Agriculture Coordination of Agricultural Research.Commission of the European Communities, Directorate-General 'Scientific and Technical Information and Information Management'1979.<A163-B2040>
sponsored by the Commission of the European Communities, Directorate-General for Agriculture, Coordination of Agricultural Research ; edited by R. ThompsonM. Nijhoff for the Commission of the European Communities1981