author = { Rizos, Chris AND Grant, D. B. },

title = { Contributions to GPS studies },

publisher = {School of Surveying},

isbn = {0858390566},

year = {1990},

booktitle = {Unisurv ; S ; 38},

address = { Kensington, N.S.W. },

url = { http://slubdd.de/katalog?TN_libero_mab2 }