Jacob H. Schiff; his life and letters.

The Jewish encyclopedia; a descriptive record of the history, religion, literature, and customs of the Jewish people from the earliest times, prepared...under the direction of...Cyrus Adler [and others] Isidore Singer, managing editor.

The Jewish encyclopedia (Volume IV): a descriptive record of the history, religion, literature, and customs of the Jewish people from the earliest times to the present day

The Jewish encyclopedia (Volume IX): a descriptive record of the history, religion, literature, and customs of the Jewish people from the earliest times to the present day

Selected letters

Karl Marx