分面浏览：发表日期 |
| 当前检索式 | ((ALL：vegetation density)) |
| 限定条件 | 无 |
| 2023 9 | 2022 18 | 2021 39 |
| 2020 83 | 2019 119 | 2018 123 |
| 2017 112 | 2016 122 | 2015 120 |
| 2014 62 | 2013 54 | 2012 77 |
| 2011 42 | 2010 44 | 2009 34 |
| 2008 49 | 2007 34 | 2006 40 |
| 2005 23 | 2004 27 | 2003 14 |
| 2002 14 | 2001 6 | 2000 3 |
| 1999 1 | 1998 2 | 1997 2 |
| 1996 4 | 1994 1 | 1993 2 |
| 1991 1 | 1990 1 | 1979 1 |
