The Polish-Mongolian Paleontological Expeditions continued in Southern Gobi from 1963 to 1971. Many skeletons of dinosaurs were excavated. The findings created a big stir among dinosaurologists world wide. The both teams were coordinated by Dr. Zofia Kielan-Jaworowska, Halszka Osm o lska, and Teresa Maryaska.These three women have become recognized not only as famous fossil hunters but are also known for their scientific studies on vertebrate fossils.
Dr. Zofia Kielan-Jaworowska began her postgraduate research on trilobites and Palaeozoic polychaetes.Later on, she became more interested in the fossil vertebrate fauna of Gobi. She visited the Russian Paleontological Institute in Moscow in 1955.There, Zofia Kielan-Jaworowska got overwhelmed by seeing skeletons of Tarhosaurus , Saurolophus , the ankylosaurs, and other fossil vertebrates collected in Gobi by the Russian expeditions in the 1940s. This had encouraged her plans to organize an expedition to Gobi to hunt for dinosaurs. Finally, Zofia Kielan- Jaworowska gave up her studies on dinosaurs and concentrated her interest to Mesozoic mammals, the field in which she became a well known authority.