સ્ફટિક: આવૃત્તિઓ વચ્ચેનો તફાવત

*{{cite web|last=Howard|first=J. Michael|coauthors=Darcy Howard (Illustrator)|url=http://www.rockhounds.com/rockshop/xtal/index.html|title=Introduction to Crystallography and Mineral Crystal Systems|publisher=Bob's Rock Shop|year=1998|accessdateaccess-date= 2008-04-20}}

*{{cite web|last=Krassmann|first=Thomas|date=2005–2008|title=The Giant Crystal Project|publisher=Krassmann|accessdateaccess-date= 2008-04-20|url=http://giantcrystals.strahlen.org}}

*{{cite web|author=Various authors|title=Teaching Pamphlets|publisher=Commission on Crystallographic Teaching|year=2007|url=http://www.iucr.ac.uk/iucr-top/comm/cteach/pamphlets.html|accessdateaccess-date= 2008-04-20}}

*{{cite web|author=Various authors|title=Crystal Lattice Structures:Index by Space Group|url=http://cst-www.nrl.navy.mil/lattice/spcgrp/|year=2004|accessdateaccess-date= 2008-04-20|publisher=[[U.S. Naval Research Laboratory]], Center for Computational Materials Science}}

*{{cite web|author=Various authors|title=Crystallography|url=http://www.xtal.iqfr.csic.es/Cristalografia/index-en.html|year=2010|accessdateaccess-date= 2010-01-08|publisher=[[Spanish National Research Council]], Department of Crystallography}}