Frazetta or Williamson ?

This two page story from New Heroic Comics #65 (March 1951) is signed "Al Williamson". It was reprinted , in B/W, in 2008's The Al Williamson Reader , but it also appeared in The Complete Frazetta White Indian in 2011.
 So, did Frazetta ink it, or maybe ghost the whole thing? Or are the comic-sleuths all wet? You decide.