Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="Ritchie, Alex" or (type any "bookEditor issueEditor" and editor="Ritchie, Alex") Add to list Journal Article A1 Chondrichthyan-like scales from the Middle Ordovician of Australia Ivan Sansom, Neil Davies (UGent) , Michael I Coates, Robert Nicoll and Alex Ritchie (2012) PALAEONTOLOGY. 55(2). p.243-247 Add to list Journal Article A1 Ichnofacies of the Stairway Sandstone fish-fossil beds (Middle Ordovician, Northern Territory, Australia) Neil Davies (UGent) , Ivan J Sansom, Robert S Nicholl and Alex Ritchie (2011) ALCHERINGA. 35(4). p.553-569