A General works Ae General encyclopædias Ap General periodicals Ar Reference works As General societies B-D Spiritual sciences B Philosophy Ba-Bf National philosophies and Systems of philosophy Bg Metaphysics Bh Logic Bi Psychology Bm Moral philosophy Br Religion, Natural theology Bt Religions Bu Folk-lore Ca Judaism Cb Bible Cc Christianity Cce Patristics Ce Apologetics, Evidences Cf Doctrinal theology Ck Ethical theology Cp Ritual theology and Church polity Cx Pastoral theology Cz Sermons D Ecclesiastical history Dk Particular churches and sects E-G Historical sciences E Biography and Portraits F-Fz History F Universal history F02 Ancient history F03 Modern history F04 Mediæval history F11-F99 History of single countries (using local list) Fa-Fw Allied studies, as Chronology, Philosophy of history, History of civilization, Antiquities, Numismatics, Chivalry, Heraldry G Geography, Travels G11-G99 Single countries (using local list) Ga Ancient geography Gf Surveying and Map-making Gz Maps H-K Social sciences Hb Statistics Hc Economics He Production Hf Labour Hi Slavery Hj Transportation Hk Distribution, Commerce Hm Money Hn Banking Hr Private finance Ht Taxation and Public finance Hu Tariff Hw Property, Capital Hz Consumption I Demotics, Sociology Ic Crime Ig Charity Ih Providence Ik Education J Civics, Government, Political science Ju Constitutions and Politics K Legislation and Law Kd Public Documents L-Q Natural sciences L General works, Metrics _Lb-Lg_ _Number and space_ Lb Mathematics _Lh-Lr_ _Matter and force_ Lh Physics Lo Chemistry Lr Astronomy _M-Q_ _Matter and life_ M Natural history Mg Geology, incl. Mineralogy, Crystallography, Physical geography, Meteorology, Palæontology My Biology N Botany Cryptogams Phanerogams O Zoology Invertebrates P Vertebrates Pg Mammals Pw Anthropology, Ethnology, Ethnography Q Medicine R-Z Arts