Report number 51 from Kvismare Bird Observatory: Verksamheten vid Kvismare fågelstation 1983 Annual Report Published 1984. 72 page(s). Örebro. Documents Document vkf_1983_aterorientering_till_boplatsen_hos_tornsvala_51_2-9.pdf Document vkf_1983_ankomstdag_till_oset_for_55_fagelarter_vararna_1950-1982_51_10-21.pdf Document vkf_1983_gulsparvens_och_tornfalkens_forekomst_vid_oset_1949-1982_51_22-28.pdf Document vkf_1983_nagot_om_blahakens_ruggning_51_29-30.pdf