2.
Timber Press Pocket Guide to Ground Covers
by MacKenzie, David S.
ISBN: 9780881927986
List Price: $19.95
3.
Complete Manual for Perennial Groundcovers
by MacKenzie, David S.
ISBN: 9780131620582
List Price: $71.00
4.
Premium Plants Superior Perennials for the Great Lakes States
by MacKenzie, David S.
ISBN: 9780970880000
List Price: $14.95