@book
{TN_libero_mab2,
author = {
International Congress on Carboniferous Stratigraphy and Geology 7 1971 Krefeld
},
title = {
Compte rendu
7,2 Krefeld, 23. - 28. August 1971
},
publisher = {},
keywords = {
Konferenzschrift
},
year = {1973},
address = {
},
}