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R.H. Økland
Botanical Museum
Univ. of Oslo,
Norwegian Institute of Land Inventory
Oslo
T. Økland
Norwegian Institute of Land Inventory
Department of Biology, Division of Botany and Plant Physiology,
University of Oslo,
Norwegian Institute of Land Inventory
Oslo,Sogndal
K. Rydgren
Norwegian Institute of Land Inventory
Department of Biology, Division of Botany and Plant Physiology,
University of Oslo,
Norwegian Institute of Land Inventory
Oslo,Sogndal