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Please note that UPSpace will be unavailable from Friday, 2 May at 18:00 (South African Time) until Sunday, 4 May at 20:00 due to scheduled system upgrades. We apologise for any inconvenience this may cause and appreciate your understanding.
An effective face support system to minimize rockfalls
Burger, N.D.L (Nicolaas Daniel Lombard); Von Wielligh, A.J.; De Wet, P.R.; Ottermann, R.W.; Visagie, J.C.