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- Time Study Analyses Progress Report 2. Quarry Haulage (United States Bureau of Mines Report of Investigations R.I. 3467).Thoenen, J. R. and E. J. Lintner.
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£ 4.41 shipping - Study of quarry costs : trap rock, sandstone, granite / by J.R. Thoenen 1930 [LeatherBound]J. R. (John Roy) Thoenen

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Free Shipping - Time study analyses : progress report 1 : quarry shovel loading / by J.R. Thoenen and E.J. Lintner 1939 [LeatherBound]J. R. (John Roy) Thoenen

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