[Groff] howto pass args to macro

[Richard Ray]

I want to pass multiple arguments to a macro and each argument may be 
composed of multiple words/characters
I figured out this works but is there a way without defining individual 
strings

.nf
.de P
\\*[\\$1]
\\*[\\$2]
\\*[\\$3]
..
.
.ds x a b c
.ds y d e
.ds z f g h i
.P x y z
Richard