TY  - BOOK
AU  - Helfrich, W..
TI  - Liquid Crystals of One- and Two- Dimensional Order / 
SN  - 3 540 10399 6
U1  - C216p55,N80 
PY  - 1974///
CY  - New York : 
PB  - Springer-Verlag , 
KW  - Physics <Liquid Crystals>
ER  -