Foundations is a 27-book series with 27 primary works first released in 1845 with contributions by Paula Wiseman, Rosa Luxemburg, and 23 others.
1 Reader • 112 pages
1884 • 3 Readers • 4
1887 • 1 Reader • 130 pages
1905 • 2 Readers • 140 pages
1 Reader • 104 pages
1880 • 2 Readers • 132 pages
1920 • 8 Readers • 4
1948 • 1 Reader • 90 pages
1845 • 1 Reader