Undercover operations (Espionage) -- See Espionage
--subdivision Secret service under names of wars, etc., e.g. World War, 1939-1945--Secret service; United States--History--Civil War, 1861-1865--Secret service
Undercover operations -- Middle East : Breaking cover : my secret life in the CIA and what it taught me about what's worth fighting for / Michele Rigby Assad
Underdetermination (Theory of knowledge) : How Do We Deal with Conflicts Between Different World Views, If They Are Based on the Same Evidence? : the Philosophical Problem of Underdetermination in the Thought of W.V. Quine and Donald Davidson
Here are entered comprehensive works on those countries having relatively low per capita incomesThis heading may be subdivided by those topical subdivisions used under names of regions, countries, etc., e.g. Developing countries--Economic conditions, and may be used as a geographic subdivision under those topics authorized for local subdivision, e.g. Technology--Developing countries
Here are entered comprehensive works on those countries having relatively low per capita incomesThis heading may be subdivided by those topical subdivisions used under names of regions, countries, etc., e.g. Developing countries--Economic conditions, and may be used as a geographic subdivision under those topics authorized for local subdivision, e.g. Technology--Developing countries
Underdrawing. : Illuminating sanctity : the body, soul and glorification of Saint Amand in the miniature cycle in Valenciennes, Bibliothèque Municipale, MS 500 / by Maria R. Grasso
