Principles and practice of research :  Strategies for surgical investigators / 
Edited by Р. Troidl [et al.]. 
 - Berlin [etc.] :  Springer-Verlag,  1986. 
 - xvii, 380 p. :  ill. ;  29 cm. 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0-387-16340-9 3-540-16340-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surgery--Research--Methodology