SUBJECT
Population
Birth control
279
Economic conditions
205
Statistics
168
Demography
164
Population policy
163
Economic aspects
152
Fertility, Human
139
Social conditions
112
Population forecasting
103
Study and teaching
91
Economic development
87
Food supply
86
History
73
Congresses
68
Cities and towns
64
Urbanization
63
Migration, Internal
61
Housing
52
Philippines
50
Human ecology
47
Natural resources
45
Labor supply
43
Mathematical models
43
Environmental aspects
41
Agriculture
38
Mortality
38
Pollution
35
Poverty
35
Population research
33
Economic policy
32
Statistics, Vital
30
Census
28
Developing countries
28
Demographic surveys
27
Environmental policy
27
Family planning
27
Research
27
Social aspects
27
Emigration and immigration
26
Sustainable development
25
Education
24
Family
23
Social indicators
23
Economic indicators
22
Women
22
Population density
21
Asia
20
Ecology
20
Addresses, essays, lectures
19
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