Author:

Grahn,Y.;Idil,S.;Ostvedt,A.M.

Year:

1994

Title:

Caradocian and Ashgillian chitinozoan biostratigraphy of the Oslo Asker and Ringerike Districts, Oslo Region, Norway.

Reference:

Grahn,Y. et al. (1994) Caradocian and Ashgillian chitinozoan biostratigraphy of the Oslo Asker and Ringerike Districts, Oslo Region, Norway. GFF,Geologiska fжreningens i Stockholm fжrhandlingar Vol. 116 # 3 P. 147- 160

Google Academy:

try to search by title in english