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Human energy expenditure in late thinning performed in mountain spruce stands
- SOWA, Janusz Michał - LESZCZYŃSKI, Krzysztof - SZEWCZYK, Grzegorz. Human energy expenditure in late thinning performed in mountain spruce stands. In Acta Scientiarum Polonorum. - Poznaň : Wydawnictwo Akademii Rolniczej im. Augusta Cieszkowskiego, 2006. ISSN 1644-0722, 2006, vol. 5, no. 1, s. 73-80.
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