Index to U.S. Army Air Corps Information Circulars : Part I. Heavier-Than-Air Circulars Nos. 1 to 565, inclusive; Part II. Lighter-Than-Air Circulars Nos. 1 to 157, inclusive.

Index to unrestricted U.S. Army Air Corps Information Circulars : Part I. Heavier-Than-Air Circulars Nos. 1 to 600, inclusive; Part II. Lighter-Than-Air Circulars Nos. 1 to 157, inclusive.
Published: (1928)

Index to U.S. Army Air Corps Information Circulars : Part I. Heavier-Than-Air Circulars Nos. 1-677; Part II. Lighter-Than-Air Circulars Nos. 1-157.
Published: (1932)

Index : Air Service orders and circulars covering period Jan. 1, 1919 to Dec. 31, 1923.
Published: (1924)

Index to U.S. Army Air Service Information Circulars (Aviation), Nos. 401-500.
Published: (1926)