The ready calculator: or, trader's certain guide, in computing the price, or amount of any quantity of goods ... With a practical table ... The second edition, corrected. By S. Thomas, ...
Slack, Thomas,1719?-1784.
London : printed for G. Robinson; and T. Slack, in Newcastle,
1771.
First published as 'Britannicus estimator', London, 1764.
S. Thomas = Thomas Slack.
ESTC