Finding percentages on the slide rule

Engineering Index Backfile | 1929

Recovering minute percentages of silver from copper liquors

Downie, C.C. | Engineering Index Backfile | 1946

Allowable percentages of soft material in coarse aggregate

Groves, H.G. | Engineering Index Backfile | 1931

Evaluation of Models to Forecast External-External Trip Percentages

Anderson, M. D. | British Library Online Contents | 1999

Minimising embodied carbon: A question of politics, not percentages

Moncaster, Alice | TIBKAT | 2024