This is from a newspaper held in the Bureau of Medicine and Surgery's archives, here in Falls Church. The run is being digitized and put online in the Medical Heritage Library.
Milt Caniff, Smokey Stover by Bill Holman, and... Johnny Jones by Criner? Anyone know anything about the last? It appears to be self-syndicated BTW, they come from The Hospital Clipper 5:11, November 1971. It'll be online at https://archive.org/details/usnavybumedhistoryoffice?sort=-publicdate moderately soon.
Update: Criner was distributed though the AFPS, and earlier examples of the strip are marked with those initials, rather than his own syndicate.