This is a website endorsed by American Battle Monuments Commission (ABMC) but produced by a private firm. You can also access the site from the instructions for ordering his deceased file.
Info should properly read:
Louis K. Chamberlain Private, 31 031 324, Army of the United States 142nd Infantry, 36th Infantry Division Entered service from Massachusetts Died 31 May 1944 Interred* in Grave 22, Row 3, Plot C, American Battle Monuments Commission (ABMC) Sicily-Rome Cemetery, Nettuno, Italy Awards: Purple Heart
Include the service number as given above when ordering his deceased file. The file will indicate the company of the 142d he was assigned to, exact location of death (Anzio Beachhead covered a wide area) and other info of interest.
(*Dogs "bury" bones. People - especially those who left behind others who loved them and cherished their memories - are "interred".)