National Seminar on Global Positioning Systems in Australia Brisbane, Qld., Institution of Surveyors, Australia, Australian Key Centre in Land Information Studies, & Bretreger, K. (1987). First National Seminar on Global Positioning Systems in Australia, Bardon Professional Development Centre, Brisbane, 19th and 20th March 1987: Proceedings. Australian Key Centre in Land Information Studies, University of Queensland.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Seminar on Global Positioning Systems in Australia Brisbane, Qld., Australia Institution of Surveyors, Australian Key Centre in Land Information Studies, και K. Bretreger. First National Seminar on Global Positioning Systems in Australia, Bardon Professional Development Centre, Brisbane, 19th and 20th March 1987: Proceedings. St. Lucia, Qld.: Australian Key Centre in Land Information Studies, University of Queensland, 1987.
Παραπομπή σε μορφή MLA (8th εκδ.)National Seminar on Global Positioning Systems in Australia Brisbane, Qld., et al. First National Seminar on Global Positioning Systems in Australia, Bardon Professional Development Centre, Brisbane, 19th and 20th March 1987: Proceedings. Australian Key Centre in Land Information Studies, University of Queensland, 1987.