Libraries and archives

United Kingdom

School of Oriental and African Studies (London)
Institute of Commonwealth Studies (London)
National Library of Scotland (Edinburgh)
British Library (London)
Alpine Club (London)
Perth & Kinross Council Archive (Perth, Scotland)

France

Bibliothèque interuniversitaire des langues orientales (Paris)
American University of Paris (Paris)
Bibliothèque publique d’information (Paris)
Bibliothèque de documentation internationale contemporaine (Nanterre)

Uganda

Makerere University (Kampala)
Uganda Society (Kampala)

United States

Harvard University (Cambridge, Massachusetts)

(…and several others via Inter-Library Loan).

Selected catalogs and search engines

Copac (British university & national library union catalog)
Sudoc (French academic & research library union catalog)
Google Books
Amazon
BookFinder