Multiple birth -- Congresses. : Twin research : proceedings of the Second International Congress on Twin Studies, August 29-September 1, 1977, Washington, D.C. / editor, Walter E. Nance, associate editors, Gordon Allen and Paolo Parisi.
Multiple birth -- Early works to 1800. : A remarkable case of a numerous birth, with observations. : By Maxwell Garthshore, M. D. F. R. S. and A. S. Fellow Of The Royal College Of Physicians Of Edinburgh. From the Philosophical transactions.