Thmyl-ktab-talm-alsbahh-pdf-llkatb-barth-dyatzyh Here

: A swimming instructor at the college level and former Olympic swimmer who has also been a European Champion. His research specifically focuses on youth and child swimming. Katrin Barth

Another guess: maybe it’s (ta'allum al-sibāḥah) = "learning swimming" — "alsbahh" could be a typo for السباحة if vowels are omitted. That would make: thmyl-ktab-talm-alsbahh-pdf-llkatb-barth-dyatzyh

Learning Swimming (Arabic: تعلم السباحة), co-authored by Katrin Barth Jürgen Dietze : A swimming instructor at the college level