Author:

Butterworth,M.A.;Williams,R.W.

Year:

1958

Title:

The small spore floras of coals in the Limestone Coal Group and Upper Limestone Group of the Lower Carboniferous of Scotland

Reference:

Butterworth,M.A. et al. (1958) The small spore floras of coals in the Limestone Coal Group and Upper Limestone Group of the Lower Carboniferous of Scotland Transactions of the Royal Society of Edinburgh.Earth Sciences Vol. 63 # 2 P. 353- 392

Google Academy:

try to search by title in english