Cowan, T. W. <br/><br/>
British bee-keepers guide book:  to the management of bees in movable-comb hives and the use of the extractor / 
T. W. Cowan 
 - 18th ed. 
 - London:  Houlston,  1881 
 - x, 180 p.:  ill.;  16 cm.