BobCatTo get the most recent publications: sort results by date.
For books on linguistics, use subject keywords: yiddish language grammar; yiddish language history.
For social cultural studies, use subject keywords: yiddish social conditions; yiddish social life and customs.
For literary criticism, use subject keywords:
yiddish literature criticism;
For criticism on specific authors, e.g., Bashevis Singer, use subject keywords:
bashevis singer criticism.