I collect memorabila from and related to the clinics held by the factory backed pro-stock teams. The problem is I don't know what all is out there. I recently scored a 1967 Landy Clinic program, and before this I didn't think anything existed prior to 1968. The list of my collection is below. Does anyone know if there are any other progams I should be looking for?

1967: Landy
1968: Sox, Landy
1969: Sox, Landy, Grotheer
1970: Sox, Landy, Grotheer
1971: Sox, Grotheer

It seems like there should be a 1967 Sox & a 1971 Landy, But I've never seen either one. Also, did Arlen Vanke have any clinic memorabilia? How about Jon Petrie?

Thank you.

-Jeff