University of Zambia Library Search for 'su:"Nontariff trade barriers."'

Invisible barriers to invisible trade /

By Griffiths, Brian.. London : Macmillan for the Trade Policy Research Centre, 1975 , Includes index. 0333185331

By Middleton, Robert.. London : M[acmillan] for the Trade Policy Research Centre, 1975 , Includes index.

By Baldwin, Robert E.. Washington, Brookings Institution 1970 081570786X

London : P.E.P., 1969

By Hamilton, Carl.. Washington, DC (1818 H St., N.W., Washington, D.C. 20433) : World Bank, 1980 , Cover title.