Using CGI variables in C-shell script

I'm just learning CGI and I was wondering if I could get help on how I could use the value of something entered in a cgi form, and use it as a variable in a another cgi script. To be clear, my form is supposed to take in business types and information from local area businesses of that type. I get the following result from the query string "bustype = restaurant" but I want to it to be just "restaurant" b/c I want to use this as an argument in a mysql command. By the way, the cgi script was created in csh if that matters. Thanks for any help you could provide.

post the script that you have written.