Need Yacc/Lex book

[Gordon Vickers]

     I will beginning a project that will require me to write an
   interpreter and believe that Yacc and Lex may be useful.  What
   book(s) may I find most helpfull in learning Yacc and Lex ?  I
   would prefer something that gives many examples.

     How portable is Yacc and Lex ?  My hope is to write something that
   can be developed on a VAX 11/750 (Ultrix) but eventually run on a
   PC-clone (SCO Unix386).

Thank you .  Please respond via email.

Gordon Vickers 408/991-5370        {mips,pyramid|philabs}!prls!gordon  
Signetics in Sunnyvale,Ca (USA)
Earth is a complex array of symbiotic relationships: Every extinction, whether
 animal, mineral, vegetable, or cultural hastens our own demise.