Jan G. Laarman

A survey of return visits to Cost...

A survey of return visits to Costa Rica by OTS participants and associates

Year unknown

Choice of technology in forestry

Choice of technology in forestry

Year unknown

Demand for an annual pass to Cost...

Demand for an annual pass to Costa Rica's national parks

Year unknown

Global forests

Global forests

Year unknown Jan G. Laarman and Roger A. Sedjo

International travel by U.S. cons...

International travel by U.S. conservation groups and professional societies

Year unknown

Nature-oriented tourism in Costa ...

Nature-oriented tourism in Costa Rica and Ecuador

Year unknown

Nature travel in the tropics

Nature travel in the tropics

Year unknown

Private enterprise initiatives for international forestry development

Year unknown George F. Dutrow and Jan G. Laarman

Tropical tourism as economic acti...

Tropical tourism as economic activity

Year unknown