Additional archive materials of and about Israel Yeshayahu can be found in the following links:
Ben Gurion Archives
Ben Gurion
The Zionist Archives in Jerusalem
The Zionist Archives
Beit Berl Archives in Kfar Saba
Beit Berl
Knesset Internet site
Knesset
Labor Party
Yad Izhak Ben-Zvi
Rishon Le-Zion Museum
© Copyright 2007, all rights reserved to the Yeshayahu family