1
Published 1999
National Academy Press

2
by Bulger, Ruth Ellen
Published 1995
National Academy Press

3
Published 2000
National Academies Press

5
by Chen, Wei-Hsin
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

6
by Keesstra, Saskia
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute