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Items where Year is 1991

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Number of items: 4.


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


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.


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)


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

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