I am not an expert on these - Steve McLachlan of Shades Stamps - Christchurch is way far more knowledgeable and an exhibitor, writer, and serious collector on this topic along with NZ Ship postcards (Hopefully one day he will contribute here for others - OR display his collections in digital form as I will show and suggest in a future article (So others may make (download or create) their own reference copies of magnificient collections others have assembled (Before they break them up and sell them for thebig financial gains (OR their families do once they have died - which we see so often these day - eg If you look in the ANTARCTIC ALBUM I have assembled - you will see a numbered collection 480-531 - Well this collection I saw (help mount at a couple of major NZ Exhibitions about 20+ years ago AND really liked - Well this collection was broken up and sold in March 2006 in Australia with it going to all parts of the globe never to be seen together again - a crying shame - They may have reprinted various postcards etc from it - I doubt if they produced a hardback book with the information and details (as displayed in the 64-128 page Ex) Today this can be done digitally like I do in album form - then saved and distributed in a number of different formats to other collectors. Refer to (Watch for my article on this here) Then add your collection here in those forms for others and prosperity. (LOVE to see them saved here)