I need following article and book.
1. RECENT PLANT INVASIONS IN THE ARID AND SEMI-ARID SOUTHWEST OF THE
DAVID R. HARRIS
Article first published online: 23 FEB 2005
2. Charles S. Elton
The Ecology of Invasions by Animals and Plants
196 pages, 42 halftones 6 x 9 © 1958, 2000
ISBN: 9780226206387 Published June 2000
Thanks in advance
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