1
Published 1947
Record Source: Published Materials
Subjects and Genres: '; ...Ludwick Institute (Philadelphia, Pa.) History....
Book
2
Record Source: Published Materials
Subjects and Genres: '; ...Ludwick Institute...
Book
3
Published 1970
Record Source: Published Materials
Subjects and Genres: '; ...Ludwick Institute (Philadelphia, Pa.) Archives Catalogs....
Book