21. United States Army aviation digest; [Richard K. Tierney, editor.] Bookmark SuDoc number: D 101.47: (v.nos.&nos.)
22. United States Army aviation digest; [Richard K. Tierney, editor.] Bookmark SuDoc number: D 101.47: (v.nos.&nos.)
23. United States Army aviation digest; [Richard K. Tierney, editor.] Bookmark SuDoc number: D 101.47: (v.nos.&nos.)
24. United States Army aviation digest; [Richard K. Tierney, editor.] Bookmark SuDoc number: D 101.47: (v.nos.&nos.)
25. United States Army aviation digest; [Richard K. Tierney, editor]. Bookmark SuDoc number: D 101.47: (v.nos.&nos.)
26. United States Army aviation digest; [Richard K. Tierney, editor]. Bookmark SuDoc number: D 101.47: (v.nos.&nos.)