A notice of the origin, progress, and present condition of the Academy of natural sciences of Philadelphia [microform] /
Ruschenberger, W. S. W.(William Samuel Waithman),1807-1895.
Philadelphia : T.K. and P.G. Collins, printers,
1852.
Sabin 74191.
Sabin Group 119.
Microfiche.
Academy of Natural Sciences of Philadelphia.