Collector resistance of power bjts

I just happened to be curious about a typical value for the collector resistance
of a power bjt ( such as in an audio amp ) and to my surprise the data that I
had handy didn't have any curves for the output characteristic ( Motorola
Bipolar power data rev 6 - and I can't locate the other 2 data books I was
looking for ).

Before I go trawling various web sites randomly, has anyone got any quick
suggestions for where to look first ?

Graham

.