stylebackgroundcolorFFF borderpx solid A paddingpx   stylebackgroundcolorFFF margin auto auto auto auto    styletextaligncenter  If you wish to contribute to this encyclopedia please  create an account  and log in   Due to persistent vandalism editing by anonymous users from your school library or institutions IP address is currently disabled If you are logged in but still unable to edit please follow these instructions To prevent abuse account creation via this address is probably also disabled  If accounts need to be created at school for class projects please have your teacher or network administrator contact us with reference to this IP address at unblockenl from an email address listed on your schools website  Alternatively if you have no Internet access at home you may  email us using your schoolissued email address and an account will be created for you Thank you if