Paul J. Crutzen je onimo sayensi to gba Ebun Nobel ninu Kemistri. Laureate., the (2014-05-21). "Paul J. Crutzen - Biographical". Nobelprize.org. Retrieved 2018-07-15.  "Who is Paul J. Crutzen? Everything You Need to Know". Paul J. Crutzen Biography. 1933-12-03. Retrieved 2018-07-15.