Great blue heronries in the Grand River watershed
Subtitle: a report on the decline of Southern Ontario's tallest native bird.
Contributors: Federation of Ontario Naturalists
Published: 1967
Place of publication: [Kitchener?
Language: eng
Number of pages: 17
Subjects: Herons; Birds -- Ontario -- Grand River watershed
Notes: Includes leaf numbered 4b, & 1 unnumbered leaf.

"Issued for the Federation of Ontario Naturalists' Annual Meeting in Kitchener, April 29-30, 1967." - leaf 13.

"Map of Grand River watershed showing 12 known great blue heronries; [index]": slip stapled onto map preceding leaf 14.

Bibliography: leaves 14-15.