Stillborg, B. (1986). Professional users handbook for rock bolting. Trans Tech.
Tohutoru Kātū ChicagoStillborg, Bengt. Professional Users Handbook for Rock Bolting. Clausthal-Zellerfeld, West Germany: Trans Tech, 1986.
Tohutoro MLAStillborg, Bengt. Professional Users Handbook for Rock Bolting. Trans Tech, 1986.
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