Of Bishops/Pastors and Elders and how they are different

https://www.baptists.net/history/2015/05/2-the-terms-elder-bishop-and-pastor-are-not-interchangeable/

Calvin

https://ccel.org/ccel/calvin/calcom.iv.html and https://www.pcusa.org/sites/default/files/theologycalvin1.pdf