"Mesozoicum": Robertus Koeppel, Praelectiones geologiae et praehistoriae pars 1 iii (Romae, 1933), 5, apud Google Books: (Paginae selectae apud Google Books).
De historia nominis definitionisque vide: Mary Grace Wilmarth, The Geologic Time Classification of the United States Geological Survey Compared With Other Classifications, accompanied by the original definitions of era, period and epoch terms (United States Geological Survey Bulletin no. 769. Vasingtoniae: U.S. Government Printing Office, 1925) (p. 9 apud Google Books).
hathitrust.org
babel.hathitrust.org
"As many systems or combinations of organic forms as are clearly traceable in the stratified crust of the globe, so many corresponding terms (as Palæozoic, Mesozoic, Kainozoic, &c.) may be made": John Phillips, "Palæozoic series" in Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge vol. 17 (1840) pp. 153–54,
