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[1]
EKSTEDT J, 1973, GRUNDFORBATTRING, V26, P3
[2]
LAVESKOG A, 1973, REPORT NATIONAL SWED
[3]
LINDSKOG A, 1975, REPORT NATIONAL SWED
[4]
LINDSKOG A, 1974, REPORT NATIONAL SWED
[5]
SODERGREN A, 1973, 2 PCB C