His The naval war in the Mediterranean, 1914-1918, 1986: CIP t.p. (Paul G. Halpern) data sh. (b. 1937)

LC data base, 12/16/85 (hdg.: Halpern, Paul G., 1937-)

The battle of the Otranto Straits, 2004: CIP t.p. (Paul G. Halpern) data sheet (B. Jan. 27, 1937)

The Mediterranean Fleet, 1930-1939, 2016: title page (Paul G. Halpern, Professor Emeritus, Florida State University.)