# Shades of grey: Two forms of grey literature important for reviews in conservation

> Research article (Biological Conservation, 2015) · cited 175× · AI/ML

**Wikidata**: [openalex:W1179295656](https://www.wikidata.org/wiki/openalex:W1179295656)  
**Source**: https://4ort.xyz/entity/shades-of-grey-two-forms-of-grey-literature-important-for-reviews-in-conservation