Connell, J. (1852). Biographical sketches of distinguished mechanics: Compiled from authentic sources. Originally published in the Delaware state journal, under the signature of "Rittenhouse". Wilmington, Del.: Porter & Eckel, printers.

Connell, John. Biographical Sketches of Distinguished Mechanics: Compiled From Authentic Sources. Originally Published in the Delaware State Journal, Under the Signature of "Rittenhouse". Wilmington, Del.: Porter & Eckel, printers, 1852.

Connell, John. Biographical Sketches of Distinguished Mechanics: Compiled From Authentic Sources. Originally Published in the Delaware State Journal, Under the Signature of "Rittenhouse". Wilmington, Del.: Porter & Eckel, printers, 1852.