Brennan, Paul
NZSS Cave Rescue Seminar - July 1985 : Communication
New Zealand speleological bulletin, vol. 8 no. 142-143 (1987)
Fraser, Don
Underground wireless communication
New Zealand speleological bulletin, vol. 7 no. 138 (1986) 531-534
Waghorn, Terry
NZSS Cave Rescue Seminar - July 1985 : Communication
New Zealand speleological bulletin, vol. 8 no. 142-143 (1987)
Were, Barry
NZSS Cave Rescue Seminar - July 1985 : Communication
New Zealand speleological bulletin, vol. 8 no. 142-143 (1987)