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REFERENCES
Allen, C.C. 1980. Icelandic subglacial volcanism:
thennal and physical studies. J. Geol., 88, 108-
117.
Áskelsson, J. 1936. On the last eruptions in
Vatnajökull. Soc. Sci. Isl., 18, Reykjavík. 68 pp.
Áskelsson, J. 1959. Skeiðarárhlaupið og umbrotin í
Grímsvötnum 1945 [The 1945 jökulhlaup and
related activity in Grímsvötn]. Jökull, 9, 22-29.
Björnsson, H. 1972. Bægisárjökull, North-Iceland.
Results of glaciological investigations 1967-1968.
Part II. The energy balance. Jökull, 22, 44-61.
Bjömsson, H. 1985. The winter balance in Grímsvötn
1954-1985. Jökull, 35, 108-109.
Björnsson, H. 1988. Hydrology of ice caps in vol-
canic regions. Soc. Sci. Isl., 45, Reykjavík. 139
pp.
Björnsson, H., and M. Hallgrímsson. 1976. Mælingar
í Grímsvötnum við Skeiðarárhlaup 1972 og 1976
[Measurements in Grímsvötn during the jökulh-
laups in 1972 and 1976]. Jökull, 26, 91-92.
Björnsson, H., and P. Einarsson. 1990. Volcanoes
beneath Vatnajökull, Iceland: Evidence from
radio-echo sounding, earthquakes and jökulh-
laups. Jökull, 40, 147-168.
Björnsson, H., F. Pálsson, Y. Gjessing, S.E. Hamran
and B. Erlingsson. 1992. Radio echo soundings of
volcanic ash layers and mass balance rates of
Vatnajökull, Iceland. In preparation.
Brandsdóttir, B. 1984. Seismic activity in
Vatnajökull 1900-1982 with special reference to
Skeiðarárhlaups, Skaftárhlaups and Vatnajökull
eruptions. Jökull, 34, 141-150.
Einarsson, M. 1989. Hitafar á íslandi á þessari öld
[Air temperature in Iceland this century].
Veðurstofa Islands Report. 66 pp.
Einarsson, P., and B. Brandsdóttir. 1984. Seismic
activity preceding and during the 1983 volcanic
eruption in Grímsvötn, Iceland. Jökull, 34, 13-23.
Eyþórsson, J. 1960. Vatnajökulsleiðangur vorið
1960. Jökull, 10, 25-26.
Grönvold, K., and H. Jóhannesson. 1984. Emption in
Grímsvötn: Course of events and chemical stud-
ies of the tephra. Jökull, 34, 1-11.
Guðmundsson, M.T. 1989. The Grímsvötn Caldera,
Iceland, subglacial topography and structure of
caldera infill. Jökull, 39, 1-19.
Guðmundsson, M.T. 1992. The crustal structure of
the subglacial Grímsvötn volcano, Vatnajökull,
Iceland, from multiparameter geophysical sur-
veys. Ph.D. thesis, University of London. 230 pp.
Guðmundsson, M.T., and H. Björnsson. Jökulhlaups
from Grímsvötn, Vatnajökull, Iceland 1934-1991.
Revised estimates of drainage from in situ mea-
surements of subglacial lake volumes. In prepara-
tion.
Hannesson, P., 1939. (Editor). Iceland. Nature and
nation in photographs. Isafoldarprentsmiðja.
Reykjavík. 42 pp. and 277 photographs.
Hannesson, P. 1958. Skeiðarárhlaupið 1945 [The
jökulhlaup in Skeiðará in 1945]. In: Frá
Óbyegðum. Bókaútgáfa Menningarsjóðs.
Reykjavík, 293-320.
Jakobsson, S.P., and J.G. Moore. 1982. The Surtsey
research drilling project of 1979. Surtsey
Research Progress Report, IX, 76-93.
Jóhannesson, H. 1983. Gossaga Grímsvatna 1900-
1983 í stuttu máli [A brief review of the volcanic
activity of the Grímsvötn volcanic system 1900-
1983]. Jökull, 33, 146-147.
Jóhannesson, H. 1984. Grímsvatnagos 1933 ogfleira
frá því ári [The 1933 Grímsvötn eruption]. Jökull,
34, 151-158.
Larsen, G. 1982. Gjóskulagatímatal Jökuldals og
nágrennis [The tephrachronology of Jökuldalur].
In: Þórarinsdóttir, H., Ó.H. Óskarsson, S.
Steinþórsson and Þ. Einarsson eds.: Eldur er í
Norðri. Sögufélag, Reykjavík, 51-66.
Nielsen, N. 1937. Vatnajökull. Kampen mellem ild og
is [Vatnajökull. The fight between ice and fire].
H. Hagerup. Kpbenhavn. 123 pp.
Nusser, F. 1948. An den Grímsvötn. [In Grímsvötn].
In: Jonas, R. 1948. Fahrten in Island. Verlag
L.W. Seidel & Sohn, Wien, 130-143.
Nprlund, N.E. 1944. Islands kortlœgning. En his-
torisk fremstilling [The surveying of Iceland. An
historical account]. Geodætisk Instituts
Publikationer, VII, Ejnar Munksgaard,
Kpbenhavn. 110 pp. and 170 maps.
Sigurðsson, S. 1942. Unpublished manuscript. 4 pp.
Sigurðsson, S. 1984. Grímsvatnaför. Útvarpserindi
JÖKULL, No. 41, 1991 43