German artillery ranged in calibre from 2 cm to 80 cm. German
artillery at the outbreak of war was standardised e.g. many
different gun barrels were interchangeable with their gun
carriages which in itself made manufacture and maintenance
German Artillery in World War II. 1939-1945.
German Artillery of World War Two.
German infantry weapons of World War II.
German Small Arms of World War II.
For a complete list of sources