תעלומת האלפא־ביתא
Series: Sidrat ha-romanim; Moʻadon ha-sefer ha-ṭov
Publisher: M. Mizraḥi
Published: 1974
Place of publication: Tel Aviv
Language: heb
Number of pages: 245
Subjects: Spy stories
Other titles: Taʻakumat ha-alfa-beta
Work titles: Horse under water