Bibliografi:Bergstrand et al 1986 rojning
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Bergstrand K-G, Lindman J, & Petré E. (1986). Underlag för prestationsmål för motormanuell röjning (Instruments for use in setting productivity targets for motor-manual cleaning). In Swedish with English summary. Redogöreöse nr 7, Forskningsstiftelsen Skogsarbeten.