|
|
|
| Based on (Angel, 1968) | Based on (Newman, 1972) (Newman, 1980) |
|
|
|
| Based on (Clarke, 1980) (Clarke, 1995) | Based on (Jeffery, 1971) (Jeffery, 1990) |
|
|
|
| Based on (Angel, 1968) | Based on (Newman, 1972) (Newman, 1980) |
|
|
|
| Based on (Clarke, 1980) (Clarke, 1995) | Based on (Jeffery, 1971) (Jeffery, 1990) |
