1936 Unity Annual Conference Yearbook
Here is the 1936 Unity Annual Conference Yearbook. Ministers and Spiritual Leaders are listed in pages 5-13 and Licensed Unity Teachers are listed in pages 18-20. I could not find anyone in this yearbook who was not working in a Unity center.
Membership in the Unity Annual Conference is stated on p. 21 of the Bylaws: "The membership of the Unity Annual Conference shall consist of recognized Unity center leaders and ministers who are working in cooperation with the Field Department of Unity School of Christianity, Kansas City, Missouri."