Spence, W., & Royal Entomological Society of London. (1849). Address delivered at the anniversary meeting of the Entomological Society of London, on the 22nd of January, 1849. printed by Richard and John E. Taylor.

Spence, William, and Royal Entomological Society of London. Address Delivered at the Anniversary Meeting of the Entomological Society of London, on the 22nd of January, 1849. printed by Richard and John E. Taylor, 1849.