Foetal death ratio
Parity progression ratio
Dependency ratios
Population sex ratio
Sex ratio at birth
Compaction Ratio
Coverage ratio
Dilution Ratio
Precipitation-effectiveness Ratio
Ratio estimation
Biogas
Land Classification
Quantity relative
Sampling fraction
Nuclear Winter
Recharge Area
Cost-benefit Analysis
Price relative
Contact
Item response rate
Emission Factor
Growth rate
Rate
Subsoil Assets
Biodiversity Indices
Fluorocarbon
Recruitment
Renewable Natural Resources
Ultraviolet Rays
Water Cycle