Richard E. Bir

Palmer, I. E., Ranney, T. G., Lynch, N. P., & Bir, R. E. (2009). Crossability, cytogenetics, and reproductive pathways in Rudbeckia subgenus Rudbeckia. HortScience, 44(1), 44–48. https://doi.org/10.21273/HORTSCI.44.1.44

Bir, R. E. (1999). Increasing rhododendron flowering. Nursery Management & Production, 15(11), 31.

Bir, R. E., Ranney, T. G., & Conner, J. L. (1997). Carryover affects of sumagic treatments on Kalmia latifolia cultivars. Proceedings of Southern Nurserymen's Association Research Conference Annual Report, 42(1997), 330–331.

Bir, R. E. (1996). Rooting stem cuttings of some eastern native rhododendrons. American Rhododendron Society Journal, 50(2), 65.

Bir, R. E. (1989). Spray water or let it drip? American Nurseryman, 169(3), 80.