# Digestive system, feeding and ecology of some New Zealand intertidal ascidians

> 1971 doctoral thesis by John Patrick Croxall at University of Auckland

**Wikidata**: [Q112113671](https://www.wikidata.org/wiki/Q112113671)  
**Source**: https://4ort.xyz/entity/digestive-system-feeding-and-ecology-of-some-new-zealand-intertidal-ascidians