"The U.S. Navy and the Landings at Salerno, Italy, 3–17 September 1943" discusses the background to Operation Avalanche and U.S. Navy participation in the amphibious landings.
Operation Avalanche Images
From the pre-invasion build-up through the beach landings
USS Savannah (CL-42) at Salerno: Strike of a German "Fritz X" Guided Bomb and Its Aftermath
Other Operation Avalanche Resources
NHHC Director's H-Gram 021, Attachment 1: "Fritz X—The Dawn of Precision-Guided Warfare"
NHHC Director's H-Gram 021, Attachment 2: "Operation Husky, the Invasion of Sicily, and Operation Avalanche, the Invasion of Italy"
U.S. Army in World War II: From Salerno to Cassino (U.S. Army “Green Book,” 1969—PDF from U.S. Army Center of Military History)
U.S. Army in World War II Pictorial Record: The War Against Germany and Italy— Mediterranean and Adjacent Areas (U.S. Army “Green Book,” 1951—PDF from U.S. Army Center of Military History)
Selected Print Sources
Robert J. Cressman, The Official Chronology of the U.S. Navy in World War II. Annapolis, MD/Washington, DC: U.S. Naval Institute Press/Naval Historical Center, 1999.
Samuel Eliot Morison, History of United States Naval Operations in World War II, Vol. IX—Sicily–Salerno–Anzio, January 1943–June 1944. Boston: Little, Brown and Company, 1954.