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found: His Observations magnétiques, 1978: t.p. (V. Courtillot) p. 2 (M. Courtillot, of IPGP)
found: La vie en catastrophes, c1995: t.p. (Vincent Courtillot) p. 4 of cover (prof. of geophys., Univ. Paris VII-Denis Diderot & dir., IPGP, Lab. of Paleomag. & Geodynamics)