   Conservation land trusts The Land Trust Alliance, formed in 1981, provides technical support to land trusts in the United States.
<meaning-changed>    Conservation land trusts The Land Trust Alliance, formed in 1981, provides technical support to land trusts in the United States.
 Wyerman, J. 2005 National Land Trust Census Report (2006), Land Trust Alliance Conservation land trusts The Land Trust Alliance, formed in 1981, provides technical support to land trusts in the United States.