Answers are grounded in this paper and cite their sources.
Twins in History and Science. By Luigi Gedda: Volume 1; 1961. Springfield, Illinois: Charles C. Thomas; Oxford: Blackwell Scientific Publications. 10” x 75”, pp. 240, with illustrations. Price: £5 (English).
No takes yet. Share an insight, caveat, or question.
Luigi 1902-2000 Gedda (1962) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: