- See the forthcoming volume of studies edited by The Oldest Latin Astrolabe Stevens Wesley Beaujouan Guy Turner Anthony to appear as a special issue of Physis (Florence).
- Numbers preceded by IC refer to the International Instrument Checklist. Sarrus's study is reprinted in Arabische Instrumente in orientalistischen Studien Sezgin F. Institut für Geschichte der Arabisch-Islamischen Wissenschaften Frankfurt 1991 I 193 230 6 vols and the various notices on the Toulouse astrolabe of Abū Bakr by J. de Rey-Pailhade (1890–91) are reprinted ibid., II, 350–56.
- Rasquin , V. 1993 . “ Astrolabic Quadrant ” . In Antwerp. Story of a Metropolis, 16th–17th Century , Edited by: Van der Stock , Jan . 301 – 301 . Antwerp : Snoek-Ducaju & Zoon .
- Zinner , E. 1967 . Deutsche und niederländische astronomische Instrumente des 11.–18. Jahrhunderts , 2nd edn , 348 – 349 . Munich : C. H. Beck . reprinted 1972
- Chase , Allen . 1977 . The Legacy of Malthus: The Social Costs of the New Scientific Racism , New York : Alfred Knopf . Barry Mehler, A History of the American Eugenics Society, 1921–40, Dissertation, University of Illinois, 1988; Elazar Barkan, The Retreat of Scientific Racism: Changing Concepts of Race in Britain and the United States between the World Wars (Cambridge: Cambridge University Press, 1992).
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