Source: http://www.ndu.edu/nwc/nwcCLIPART/NWCclipart.html archive copy at the Wayback Machine

To the best of our knowledge, all images in the collection belong to the public domain and are thus available for use without obtaining permissions. However, we request that any substantial use of this collection--to include especially significant incorporation of its files on web sites--fully credit the National War College as a professional courtesy.

Chinese machine gun Type 53 (version of russian SG-43

	本檔案的著作權持有者，在註明所有人姓名的前提下，允許任何人使用本檔案於任何用途。包含再散佈、衍生作品、商業用途及其他用途。
	Attribution