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Issue Date	Title	Author(s)
2020	GRY 228	-
2020	GRY 226	-
2020	GRY 220	-
2019	GEOMETRIC GEODESY	-
2018	GEL 526	-
2017	GEL 526	-
2016	GEL 526	-
2018	GEL 525	-
2018	GEL 524	-
2018	GEL 523	-
2017	GEL 523	-
2018	GEL 522	-
2017	GEL 522	-
2018	GEL 521	-
2017	GEL 521	-
2018	GEL 519	-
2016	GEL 519	-
2018	GEL 518	-
2018	GEL 518	-
2016	GEL 518	-