There is a small collection of material relating to the Kalarasher Bessarabier Progressive Association (the Kalarash landsmanshaftn organization) at YIVO Institute for Jewish Research in Manhattan. YIVO is housed at the Center for Jewish History (photo left) at 15 West 16th Street, New York, NY 10011.
Included in the collection are a photocopy of the Souvenir Journal of the 18th anniversary banquet of the Association and an audio tape of Jacob Wiesenthal, who chaired the 1935 celebratory dinner.
Directions to and hours of the Center for Jewish History are available on its website, as is information about the Genealogy Institute at the Center.
YIVO at the Center for Jewish History