Steiner, Rudolf..
How to know higher worlds : a modern path of initiation /
translated by Christopher Bamford 
. - Hudson, N.Y.  : Anthroposophic Press,  1994 
. - [vi], 259 p.  20 cm. 
 - ((Classics in anthroposophy )
<br/><label>  ISBN: </label>0-88010-372-8