Solidaritas sebagai jalan mencapai kemajuan moral dalam masalah lingkungan hidup : suatu kritik terhadap pendekatan filsafat lingkungan fundamentalis = Solidarity as a path to moral progress in environmental issues: a criticism of the fundamentalist approach to environmental philoshopy

Social problems

Environmental science : problems, concepts, and solutions

Singular and degenerate cauchy problems

Pattern's of China's lost harmony : a survey of the country's environmental degradation and protection