1. Dep. of Agronomy and Horticulture; Univ. of Nebraska-Lincoln; 202 Keim Hall Lincoln NE 68583-0915
2. Dep. of Resort and Hospitality Management; Florida Gulf Coast Univ.; Fort Myers FL 33965-6565
3. Teagasc College of Amenity Horticulture, National Botanic Gardens; Glasnevin Dublin Ireland
4. Dep. of Agronomy and Horticulture; Univ. of Nebraska-Lincoln; Lincoln NE 68583-0915