1.
 |  | Title: Michigan Trees, Revised and Updated : A Guide to the Trees of the Great Lakes Region by Burton V. Barnes, Warren H. Wagner ISBN: 0472089218 Publisher: UMP Pub. Date: 28 January, 2004 List Price: $19.95 Amazon.com Price: $13.97 |
2.
 |  | Title: Michigan Trees : A Guide to the Trees of Michigan and the Great Lakes Region by Burton V. Barnes, Warren H. Wagner ISBN: 0472080180 Publisher: UMP Pub. Date: 15 September, 1981 List Price: $17.09 Amazon.com Price: $17.09 |
3.
 |  | Title: Manual of the Flowering Plants of Hawai'I (Bernice B. Bishop Museum Special Publication, 97) by Warren Lambert Wagner, S. H. Sohmer, Warren Lambert Wagner ISBN: 0824821661 Publisher: University of Hawaii Press Pub. Date: August, 1999 List Price: $95.00 Amazon.com Price: $95.00 |
4.
 |  | Title: Systematics of Oenothera Section Oenothera Subsection Oenothera (Systematic Botany Monographs, Vol 50) by Werner Dietrich, Peter H. Raven, Warren L. Wagner ISBN: 0912861509 Publisher: Amer Society of Plant Pub. Date: March, 1997 List Price: $30.00 Amazon.com Price: $30.00 |