Ethics and spiritual values : promoting environmentally sustainable development : associated event of the third Annual World Bank Conference of Environmentally Sustainable Development, co-sponsored by the Center for Respect of Life and Environment, the World Bank Spiritual Unfoldment Society, and the World Bank, Washington, D.C., October 2-3, 1995 / Ismail Serageldin, Richard Barrett, editors. (Environmentally sustainable development proceedings series ; no. 12)