Dear colleagues, I am currently working on a manuscript on density-dependence (DD) detection across taxa. I have been unable to find at my university and from colleagues nearby the old paper by Smith (1935) in which the term DD is used for the first time to define the population regulation negative feedbacks, i.e. Smith 1935. The role of biotic factors in the determination of population densities. Journal of Economic Entomology 28, 873-898. If you had it available, I would very much appreciate a pdf copy of this old reference. Many thanks for your time on this request, <mailto:salvador.herrando-perez@adelaide.edu.au> Salva Salvador Herrando-Pérez School of Earth and Environmental Sciences, University of Adelaide, SA 5005, Australia Office phone: +61 8 8303 5254 / Office fax: +61 8 8303 4347 / Mobile phone: +61 406049010 https://www.adelaide.edu.au/directory/salvador.herrando-perez