F549. 0724
Tun 
I
Tunell, George
Introdution to crystallography ; a labortory manual for students of mineralogy and geology [by] George Tunell [and] Joseph Murdoch
2d . ed . San Francisco , W.H >Freeman [c1959]
vii, 58 p. diagrs. 28cm. 
Ntas bibliográficas al pie de las páginas