Items where Year is 1991

C

Cushman, J. Hall and Whitham, Thomas G. (1991) Competition mediating the outcome of a mutualism: Protective services of ants as a limiting resource for membracids. American Naturalist, 138 (4). pp. 851-865. ISSN 0003-0147

K

Kolb, T.E. and Wagner, M.R. and Covington, W.W. (1991) Forest health from different perspectives. Technical Report. USDA Forest Service, Fort Collins, US.

L

Lew, Alan A. (1991) Place representation in tourist guidebooks - an example from Singapore. Singapore Journal of Tropical Geography, 12 (2). pp. 124-137. ISSN 1467-9493 (Submitted)

W

Wyckoff, Susan and Tegler, Stephen C. and Engel, Lisa (1991) Nitrogen abundance in Comet Halley. The Astrophysical Journal, 367. p. 641. ISSN 1538-4357