What has the author AHMAD ZAKI YAMANI written?

Zaki Yusef Saad has written:

'Royal excavations at Saqqara and Helwan (1941-1945)'

'The excavations at Helwan' -- subject(s): Antiquities, Art, Egyptian, Civilization, Egyptian Art

'Royal excavations at Helwan (1945-1947)' -- subject(s): Tombs