Approver Comments:
I agree that the Aron Sztender born in 1931 listed in the database is the student who signed the album: in 1941, he would have been 10 years old, an appropriate age to have attended school #13b.
Also note his addresses: Breitegasse 3 #3, and Ziegel 64.
In the future, please also use the comment field to explain your process and how you determined that this student is the most likely candidate to have signed the album.