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“Appendix E: Irregular Verbs” in E. Einhorn (1974), Old French: A Concise Handbook, Cambridge, UK: Cambridge University Press, ISBN 0-521-09838-6
“Appendix E: Irregular Verbs” in E. Einhorn (1974), Old French: A Concise Handbook, Cambridge, UK: Cambridge University Press, ISBN 0-521-09838-6