Labor 276 Labor and laboring classes 812 Laboratory manuals 710 Labor Day 139 Labor economics 309 Labor laws and legislation 998 Labor market 541 Labor mobility 155 Labor policy 346 Labor productivity 466 Labor supply 1,615 Labor unions 401 Lacson, Panfilo M. 272 Lacson, Panfilo M., Sr 610 Laguna 143 Land 206 Landfills 150 Land reform 1,525 Landscape architecture 483 Landscape gardening 165 Land settlement 194 Landslides 286 Land tenure 781 Land titles 274 Land use 1,088 Land use, Rural 183 Land use, Urban 168 Language 819 Language acquisition 362 Language and culture 277 Language and education 154 Language and languages 2,042 Language arts 270 Language arts (Elementary) 245 Language policy 188 Languages 459 Languages, Modern 150 Lasers 144 Latin language 152 Law 2,256 Law and legislation 379 Law and legislation 6,069 Laws and legislation 360 Laws and regulations 1,605 Lawyers 1,414 Leadership 2,234 Learning 533 Learning disabilities 188 Learning disabled children 234 Learning, Psychology of 781 Legal ethics 151 Legal status, laws, etc 1,185 Legarda, Loren 349 Legends 545 Legislation 159 Legislative bodies 154 Legislative hearings 205 Legislators 1,056 Leisure 257 Lent 154 Lesbians 233 Lesson planning 232 Leyte 170 Libel and slander 285 Liberalism 253 Liberal Party (Political party) 262 Liberty 416 Librarians 338 Libraries 1,081 Library administration 277 Library science 540 Life 245 Lighting 237 Lim, Alfredo S. 267 Linear programming 264 Linguistics 698 Literacy 492 Literary collections 141 Literature 1,724 Literature and society 290 Literature, Comparative 171 Literature, Modern 314 Loans 314 Loans, Foreign 249 Local area networks (Computer networks) 151 Local elections 178 Local finance 266 Local government 1,892 Local Government Units 620 Local transit 365 Lockdowns (Safety measures) 461 Locsin, Teodoro L., Jr 139 Logging 394 Logic 604 Logic design 176 Logic, Symbolic and mathematical 408 Love 397 Lozada, Rodolfo I., Jr 247 Lungs 208 Luzon 176