How and Where May I Access These Publications?

Are you aware of these publications? And how and where may I access them?
Directory of British Guiana (Argosy, 1909)

Moore, John Richard (1874) A Hand Book of the Causes of Non-Success and Degradation of the Negro Race in British Guiana (Demerara, 1874)
Evans, William Walter (1908)  Biographical Portraits: Georgetown; British Guiana, 1908.

Ruhomon, Joseph (1931) Reminiscences of Old Berbice (The publication is said to be a pamphlet. I asked several Indo-Guyanese academics about it. None responded. That’s the nature of the beast.)

East Coast Demerara Almanack and Directory for the year 1888 ( and for all the available years)

Cummings, Leslie (1963) Land of Many: Article, September 1, 1963

Cummings, Leslie  - "The Name Guiana: Its Origin and Meaning", Journal of the British Guiana Museum and Zoo of the Royal Agricultural and Commercial Society. #38 (July, 1963 - June 1964) 49-58.