LB1025 Teaching (Principles and Practice) QD Chemistry QD450 Physical and theoretical chemistry QD71 Analytical chemistry LB Theory and practice of education LB2300 Higher Education LB2361 Curriculum LC1022 Computer-assisted education QD241 Organic chemistry ETD HB Economic Theory. Demography HB522 Income. Factor shares HB615 Entrepreneurship. Risk and uncertainty HJ2005 Income and expenditure. Budget L Education (General) LB1603 Secondary Education. High schools LB1775 Professional aspects of teaching and school administrators. Vocational guidance LB2165 Teacher training in universities and colleges LC Special aspects of education LC149 Literacy. Illiteracy Q Science (General) QD146 Inorganic chemistry QH540 Ecology QK Botany RS160 Pharmacognosy. Pharmaceutical substances (Plant S589.8 Plant growing media. Potting soils TX Home economics and inorganic) animal