The Population Biology of Invaders: Discussion Kornberg, Hans ; Crawley, M. J. ; Lawton, J. H. ; Usher, M. B. ; Southwood, Richard ; O'Connor, R. J. ; Gibbs, A. Abstract Publication: Philosophical Transactions of the Royal Society of London Series B Pub Date: December 1986 Bibcode: 1986RSPTB.314..730K