Early childhood education 834 Earth sciences 360 Earthquakes 610 Ecology 1,352 Econ. condit 515 Econometric models 2,174 Econometrics 749 Economic aspects 9,318 Economic assistance 1,072 Economic assistance, Domestic 328 Economic condition 549 Economic conditions 14,973 Economic development 5,535 Economic development projects 925 Economic forecasting 873 Economic history 1,134 Economic indicators 526 Economic integration 693 Economic policy 8,638 Economic relations 324 Economic stabilization 390 Economics 4,938 Economics, Mathematical 544 Editorial cartoons 5,179 Education 10,844 Education and state 688 Education, Elementary 624 Education, Higher 1,415 Education, Preschool 441 Education, Secondary 557 Educational change 462 Educational innovations 411 Educational leadership 332 Educational planning 433 Educational psychology 733 Educational sociology 471 Educational technology 622 Educational tests and measurements 857 Educators 1,438 Effect of technological innovations on 371 Election 1,169 Elections 5,223 Electric power systems 386 Electric utilities 980 Electrical engineering 523 Electronic book 587 Electronic books 25,531 Electronic circuits 346 Electronic commerce 602 Electronic data processing 1,148 Electronic digital computers 486 Electronics 584 Emergency management 1,008 Emigration and immigration 1,015 Employees 2,147 Employment 4,148 Energy conservation 521 Energy policy 634 Engineering 1,298 Engineering design 482 Engineering mathematics 484 English 1,444 English drama 542 English fiction 442 English language 9,641 English literature 1,583 English poetry 1,346 Enrile, Juan Ponce Sr 377 Entrepreneurs 333 Entrepreneurship 1,029 Environmental aspects 3,989 Environmental engineering 406 Environmental law 403 Environmental management 369 Environmental policy 2,111 Environmental protection 1,469 Environmental sciences 538 Epidemiology 372 Equality 511 Equipment and supplies 743 Essays 780 Estrada administration 574 Estrada, Joseph E. 2,466 Ethics 1,408 Ethnic relations 518 Ethnology 2,612 Evaluation 3,084 Evolution 521 Evolution (Biology) 338 Examinations 811 Examinations, questions, etc 942 Excavations (Archaeology) 399 Executives 786 Exercise 1,040 Exhibitions 1,979 Experimental design 378 Experiments 602 Export-import trade 1,000 Exports 532 Extrajudicial executions 475