Securing the future of heritage trees: a protection toolkit for communities (2011) is based on work by the Ontario Heritage Tree Alliance. This publication, devoted to the topic of heritage trees, is available from the Toronto Public Library.
The publisher is the Ontario Urban Forest Council.
The discussion that follows includes comments from David Switzer.
I took this photo of David (he’s wearing his bike helmet and rear-view mirror) when I met outside the Alderwood Library on April 13, 2012.