IQaamah when prayers are joined

If two prayers are 
joined together,
the 'iQaamah will be said
for each prayer.

The scholars are united on this.

Their evidence is the fact
that when the Messenger of Allaah (sallallaahu alayhi wa sallam)
prayed maghrib and 'ishaa together
at Muzdalifah, an 'iQaamah was said
for each prayer. 

The second evidence is that
since each prayer is prayed 
separately, it is only logical
that an 'iQaamah is said for 
each prayer.

Reference(s):

Kuwaiti Encyclopedia of fiQh