Columbia subject headings:
Aircraft accidents--Investigation--Bulgaria.
Aircraft accidents--Investigation--Israel.
Bulgaria--Relations--Israel.
Cold War.
El ʻAl Flight LY426 Crash, Bulgaria, 1955.
El ʻal, netive aṿir le-Yiśraʼel--History.
Israel--Relations--Bulgaria.
Israel. Mosad le-modiʻin ṿe-tafḳidim meyuḥadim.
Harvard subject headings:
Princeton subject headings:
Aircraft accidents--Bulgaria.
Bulgaria--Relations--Israel.
Cold War.
El ʻal, netive aṿir le-Yiśraʼel--History.
Israel--Relations--Bulgaria.