@techreport	(etreetr,
author	=	"T. Tu and J. Lopez and D. O'Hallaron" ,
title	=	"The {Etree} Library: A System for Manipulating Large Octrees on Disk" ,
institution=	"Carnegie Mellon School of Computer Science" ,
year	=	"2003" ,
type    =       "" ,
address =       "" ,
month	=	"July" ,
number	=	"CMU-CS-03-174" ,
)