2
Starke, Linda
| W.W. Norton & Co. |
2011
3
Sayer, Jeffrey
| Cambridge University Press |
2004
5
Marine, Gene
| Simon and Schuster |
1969
6
Laycock, George
| published in cooperation with the National Audubon |
1971
7
Havlick, Spenser W.
| Macmillan |
1974