org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse English The A Journal of Natural Philosophy, Chemistry, and the Arts...
in DJVU-format: File:Popular Science Monthly Volume 6.djvu English...
in DJVU-format: File:Popular Science Monthly Volume 9.djvu...
English determination method or standard: SHA-1...
English history of nursing to 1920 by Lavinia L. Dock determination method or standard: SHA-1...
English Vol. 6, No. 6 (August 11, 1870) of The Revolution, a newspaper established by women's rights activists Susan B. Anthony and Elizabeth Cady Stanton...
in DJVU-format: File:Popular Science Monthly Volume 7.djvu...