Micro-coprolites inside Ordovician body fossils from EstoniaToom, Ursula; Isakar, Mare; Hints, Olle; Madison, A.; Vinn, Olev13th International Symposium on the Ordovician System : Novosibirsk, Russia (July 19-22, 2019) : contributions2019 / p. 211-213 : ill http://www.igcp653.org/wp-content/uploads/2019/07/ISOS13Proceedings.pdf