Darlington, W. (1826). Address to the Chester County Cabinet of Natural Science, at the organization of the society, on the 18th of March, 1826. West Chester, Pa.: Printed by S. Siegfried.

Darlington, William. Address to the Chester County Cabinet of Natural Science, At the Organization of the Society, On the 18th of March, 1826. West Chester, Pa.: Printed by S. Siegfried, 1826.

Darlington, William. Address to the Chester County Cabinet of Natural Science, At the Organization of the Society, On the 18th of March, 1826. West Chester, Pa.: Printed by S. Siegfried, 1826.