02a0018668;87-421-0753-9;20011205d1987 ekmy0engy01;eng;a z 000yy;r;Lower Cretaceous calcareous nannofossil biostratigraphy in the Danish Central Trough;Erik Thomsen;Koberhavn;Danmarks Geologiske Undersogelse;1987;89 p.;ill;Geological Survey of Denmark;Serie A;no.20;2001b;aGeological Survey of Denmark ; hSerie A ; vno.20;丹麦中央地槽中下白垩世地层中钙质超微化石生物地层学;a586;Thomsen;Erik;101;456249;P;253.9;D23;vA/20 ; r599.44;a02;b1;cP