[URGENT]: Convert BMP to PBM

["Nuno Emanuel F. Carvalho" <nemanuel@student.dei.uc.pt>]

Hi,

  Where could I find a program which could convert "PC bitmap data,
Windows 3.x format" to PBM format !?
  As I had hundreds os images on BMP I would like a program where I
could make a script to convert them automatically.
  Kind of:
                  $ bmp2pbm <filename>

 Thanks.

 Regards,
   Nuno Carvalho

P.S. Please, reply to me, since i'm not subscribed on this ML.