http://www.iucr.org/iucr-top/comm/cteach/pamphlets.html
http://www.iucr.org/iucr-top/comm/cteach/pamphlets.html
http://alpha2.bmc.uu.se/terese/crystallization/library.html
http://www.biophys.mpg.de/kuehlbrandt/zeelen/xtal.html
http://xtal.pharm.nwu.edu/crystal/CrystSites.html
http://www.scf.fundp.ac.be/~jwouters/DRX/diffraction.html