Skala, Helen <br/><br/>
Trellis Theory 
Helen Skala 
 - Providence  American Mathematical Society  1972 
 - 42 p  ill  25 cm 
 - Memoirs of the American Mathematical Society  Number 121 .
<br/><br/> Contine bibliografie  Lucrarea este multigrafiata 
<br/><br/><label>ISBN: </label>82181821X