Citations
[[reflist]]
- ^ Fishback, Price V. (1992-08-13), "Death's Taken a Mighty Toll for Coal, Coal, Coal", Soft Coal, Hard Choices, Oxford University Press, pp. 102–126, ISBN 9780195067255, retrieved 2019-02-19
Citations
[[reflist]]
- ^ Fishback, Price V. (1992-08-13), "Death's Taken a Mighty Toll for Coal, Coal, Coal", Soft Coal, Hard Choices, Oxford University Press, pp. 102–126, ISBN 9780195067255, retrieved 2019-02-19