Encyclopaedia 137 History 65 General Book 60 Knowledge Western 60 Dictionary 55 Literature collections 54 English; Encyclopedia 52 Philosophy 51 General encyclopedic works 44 English; Poetry journal 41 Encyclopedias and dictionaries 36 Britannica 32 Economics 29 History and criticism 28 English;Encyclopedia 26 Sociology 25 Pure sciences - Dictionaries -- encyclopedias 20 English literature 19 General science 19 Macropaedia 19 Education 18 Science 18 BIOLOGY 13 Literature 13 Criticism 12 Linguistics 12 English 11 Micropaedia 10 Politics and government 10 Social conditions 10