[Inkscape-user] Basic problem with font substutition

I have a simple text document saved as a PDF using Inkscape (0.42.2). If I specify the text to be rendered in something vanilla like Times New Roman or Arial I can see in Evince successfully rendered text. With other more exotic fonts like Bookman Old Style or a Bitstream, some other font has been substituted in when viewed in Evince (or other pdf viewers for that matter). This question must have been asked a thousand times. Any pointers for how to prevent such font substitution?

Many thanks for any assistance.

Regards

Fog_Watch.

Slackware 10.2