Arbib, Roberto

I'm sorry, but I couldn't find any information about an author named Arbib, Roberto who wrote a book titled "ha-Sod bi-gevulot ha-tevunah." It's possible that this author or book may not be widely known or recognized in the sources available to me. If you have any additional details or context about this author or book, I'd be happy to try and provide more information or assistance based on that. Alternatively, I can offer information on a different author or book if you'd like. Just let me know how I can help further.

Books

ha- Sod bi-gevulot ha-tevunah