Census 1921 :  classification of industries / 
General Register Office. 
 - London :  HMSO,  1924. 
 - viii, 79p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Industries--Great Britain.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Great Britain--Census, 1921.