Basic principles of risering. 

 - Reading, Mass :  Addison Wesley,  1968 
 - ix,34p.  ; ill.  28cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Riser (Founding)<br/>Programmed instruction
<br/><br/><label>LC Class. No.: </label>QTO TS320.A4