by Hill, K.D, Chase, M.W, Stevenson, D.W, Hills, H.G, Schutzman, B
Published in International journal of plant sciences (01.11.2003)

by Frothingham, R, Hills, H.G, Wilson, K.H
Published in Journal of Clinical Microbiology (01.07.1994)

by Duvall, M.R, Clegg, M.T, Chase, M.W, Clark, W.D, Kress, W.J, Hills, H.G, Eguiarte, L.E, Smith, J.F, Gaut, B.S, Zimmer, E.A
Published in Annals of the Missouri Botanical Garden (1993)

by Hills, H.G
Published in American Orchid Society bulletin (01.06.1993)

by Chase, M.W. (University of North Carolina, Chapel Hill, NC), Hills, H.G
Published in Bioscience (01.01.1992)

by Hills, H.G. (VAMC, Durham, NC)
Published in American Orchid Society bulletin (01.06.1993)

by Cameron, K.M, Chase, M.W, Whitten, W.M, Kores, P.J, Jarrell, D.C, Albert, V.A, Yukawa, T, Hills, H.G, Goldman, D.H
Published in American journal of botany (1999)