Author	Kjellström, G.
Year	1971b
Journal	Sveriges Geologiska Undersokning, ser.C, no.669, v.65, no.15, p.1-35.
Title	Middle Ordovician microplankton from the Grotlingbo Borehole No.1 in Gotland, Sweden.

Abstract Kjellstrom, G., 1971b: Middle Ordovician microplankton from the Grotlingbo Borehole No.1 in Gotland, Sweden; Sveriges Geologiska Undersokning, ser.C, no.669, v.65, no.15, p.1-35.