https://www.jewishencyclopedia.com/articles/412-abraham-de-caslar-ben-david
CASLARI, ABRAHAM BEN DAVID - JewishEncyclopedia.com
Complete contents the 1906 Jewish Encyclopedia.
abraham ben david
https://www.jewishencyclopedia.com/articles/419-abraham-ben-david-of-ostrog-volhynia
ABRAHAM BEN DAVID OF OSTROG (Volhynia) - JewishEncyclopedia.com
Complete contents the 1906 Jewish Encyclopedia.
abraham ben davidostrogvolhynia