• 4 Videos, Slides, Films

• 4 Conservation of natural resources
• 3 Natural resources
• 2 Business ethics
• 2 Economic aspects
• 2 Effect of human beings on
• 2 Environmental aspects
• 2 Environmental geography
• 2 Human ecology
• 2 Human geography
• 2 Nature
• 2 Pollution
• 2 Refuse and refuse disposal
• 2 Social ecology
• 2 Toxicology
• 2 Water
• 1 Architecture, Modern
• 1 Business enterprises, Foreign
• 1 Cultural geography
• 1 Energy development
• 1 Environmental policy
• 1 Government policy
• 1 History
• 1 Hydrology
• 1 International business enterprises

• 4 Films Media Group
• 4 Films for the Humanities & Sciences (Firm)
• 1 Ethical Markets Media
• 1 Java (Firm)
• 1 Parthenon Entertainment (Firm)
• 1 System TV (Firm)

• 4 English

• 1 East Asia

• 4 Internet videos
• 4 Videorecording
• 3 Video recordings for the hearing impaired

Limit year range