00353nam a2200097Ia 4500008004100000040002900041050002400070100003100094245009100125260003900216230107s9999||||xx |||||||||||||| ||und||  cChuka University Library  aQD 908 bP67 1956 V  aPorter, M.W. and L.W. Codd 4aThe barker index of crystals:A method for the identification of crystalline substances  aW.Heffer&Sons LtdbCambridgec1956