Dr. S.A. Lucas & A. F. Masao: The Present State of Research on cultural Development in Tanzania, 1974. Dr. I.K. Katokeand Dr. S.A. Lucas: Cultural Development...
ISBN 1-841-13237-3. Cite uses deprecated parameter |coauthors= (help) Bergkamp, Lucas (2001). "Introduction". Liability and Environment. Martinus Nijhoff Publishers...
Julie Lorenzen, Central Michigan University. Retrieved Novemba 2006. Robert Lucas, Jr. (2003). "The Industrial Revolution". Federal Reserve Bank of Minneapolis...