Final answer:
To obtain information on the people and population of Korea, one should utilize an almanac, as it includes up-to-date statistics encompassing a range of topics, including population data.
Step-by-step explanation:
To gather information about the people and population of Korea, you should look for an almanac. Almanacs and yearbooks provide comprehensive and up-to-date information, including statistics on various topics such as politics, economics, and population. Specifically, resources like the World Almanac and Book of Facts offer a plethora of data on a wide array of subjects, spanning from government statistics to scientific data, and would include the current information on Korea's population.
While an encyclopedia can offer general information and background on Korea, and an atlas may help you understand geographical data and some demographic details, the almanac is specifically tailored for the latest statistical data and would likely have the information you're seeking about Korea's population. General reference works can provide a solid foundation for your research, which you can then augment with more specific data from the almanac.