United States. Central Intelligence Agency, CIA World Fact Book, 2004 — Bhutan (2004)
“ Economy Bhutan Economy - overview: The economy, one of the world's smallest and least developed, is based on agriculture and forestry, which provide the main livelihood for more than 90% of the population. Agriculture consists largely of subsistence farming and animal husbandry. Rugged mountains dominate the terrain and make the building of roads and other infrastructure difficult and expensive. The economy is closely aligned with India's through strong trade and monetary links and dependence on India's financial assistance. ”
