Percival, T. Observations on the state of population in Manchester (1789).--Heberden, W. Observations on the increase and decrease of different diseases and particularly of the plague (1801).--Percival, T. Essay on the smallpox and measles (1789)
Notes
Percival, T. Observations on the state of population in Manchester (1789).--Heberden, W. Observations on the increase and decrease of different diseases and particularly of the plague (1801).--Percival, T. Essay on the smallpox and measles (1789)