About: letter of introduction

Head noun: letter
Postmodifier: of introduction

Same concepts
http://dbpedia.org/resource/Letter_of_introduction

Broader concepts

label	provenance	confidence
credentials	isap:452764823	0.522985
letter	isap:393071133	0.319056

Narrower concepts

label	provenance	confidence
letter	isap:393071076	0.402255
work	isap:306343666	0.312765
card	isap:307084203	0.299751