Fourth international symposium on spatial data handling
1991 ◽
Vol 46
(2)
◽
pp. 123-127
1993 ◽
Vol 48
(1)
◽
pp. 37
1998 ◽
Vol 12
(4)
◽
pp. 427-427
1998 ◽
Vol 12
(1)
◽
pp. 103-104