Annual Colonial reports for the following countries are made available online by the University of Illinois at Urbana-Champaign
Bechuanaland:
http://libsysdigi.library.illinois.edu/ilharvest/Africana/Books2011-05/466568/
Gold Coast:
http://libsysdigi.library.illinois.edu/ilharvest/Africana/Books2011-05/5530214/
Other reports include Kenya, Northern Rhodesia, Nyasaland, Gambia, Nigeria, Basutoland, Swaziland, Uganda
dear sir, madam,
i am very inetrtested in the colonial reports of NorthernRhodesia
i am very interested in colonial reports of Northern Rhodesia for my research
Digitized Bluebooks and Administration Reports can be obtained against a reasonable fee here: https://www.britishonlinearchives.co.uk/collection.php?cid=9781851172740.