Author:

Gray,J.;Boucot,A.J.;Grahn,Y.;Himes,G.

Year:

1992

Title:

A new record of Early Silurian-age land plant spores from the Parana Basin, Paraguay (Malvinokaffric Realm).

Reference:

Gray,J. et al. (1992) A new record of Early Silurian-age land plant spores from the Parana Basin, Paraguay (Malvinokaffric Realm). Geological Magazine Vol. 129 # 6 P. 741- 752

Google Academy:

try to search by title in english