A more simplified version, along with some pretty important worked examples can be found here:
REFER: Page 1 http://picasaweb.google.com/rishav21/Work#5466988761382399554
REFER Page 2 http://picasaweb.google.com/rishav21/Work#5466988767091657698
You can also REFER: http://en.wikipedia.org/wiki/Crystallographic_defect (read it if you have patience!)
)
,
0
