Sigfrid, I., Wyttenbach, D., & Lydekker, G. (1766). Theological theses: Containing the chief heads of the Christian doctrine, deduced from axioms : composed and publickly defended in presence and under the direction of the very Reverend and most judicious John Henry Ringier, V.D.M. and professor of controversial divinity in the academy at Bern. New-York: Printed and sold by Samuel Brown ....

Sigfrid, Isaac., Daniel Wyttenbach, and Gerrit Lydekker. Theological Theses: Containing the Chief Heads of the Christian Doctrine, Deduced From Axioms : Composed and Publickly Defended in Presence and Under the Direction of the Very Reverend and Most Judicious John Henry Ringier, V.D.M. and Professor of Controversial Divinity in the Academy At Bern. New-York: Printed and sold by Samuel Brown ..., 1766.

Sigfrid, Isaac., Daniel Wyttenbach, and Gerrit Lydekker. Theological Theses: Containing the Chief Heads of the Christian Doctrine, Deduced From Axioms : Composed and Publickly Defended in Presence and Under the Direction of the Very Reverend and Most Judicious John Henry Ringier, V.D.M. and Professor of Controversial Divinity in the Academy At Bern. New-York: Printed and sold by Samuel Brown ..., 1766.