Hayek and other Mont Pèlerin founders co-edited a 1971 libertarian festschrift volume.

Evidence

Harper, F. A., F. A. von Hayek, Henry Hazlitt, Leonard E. Read, and Gustavo R. Velasco (eds.). 1971. Towards Liberty. Menlo Park, CA: Institute for Humane Studies. — Philip Mirowski & Dieter Plehwe (eds.), The Road from Mont Pèlerin, 1396