I've only got volume six, from 1966. Cost me NZ$10 second-hand (that's about three or four pounds). Apparently its worth a lot more..... I bet there's lots of people on here with the entire set.
I have : Vol.14 (Specialised subject-Trade & transport of Animals) Vol.20 (Spec. subject-Breeding Endangered Species in Captivity) and Vol.30 (Spec. subject-Invertebrates) My local council library had the entire set (up to about Vol.38), worth a lot of money, and I used to go there and read them all the time.(You weren't allowed to borrow them.) Then one day they were gone, apparently donated to Taronga zoo.
The chester zoo library has a lot of them. Pop in if you have time. they also have international zoo news.
Volume 14 (Trade & Transport of Animals), having been published in 1974, is a bit out-of-date as regards the regulations world wide for trade of animals, as CITES was only being proposed at that stage. The section on transportation deals with such diverse species as flamingoes, dolphins, manatees and african ungulates, and is still quite relevant. Volume 20 (Breeding Endangered Species) was published in 1980 and proposed ideas which are accepted procedure today but were quite revolutionary back then, such as warnings about inbreeding, and also the need for zoos to co-operate in regional breeding plans. A break-through article titled "Tomorrow's Ark: By Invitation Only" put forward the (then) revolutionary idea that zoos would not be able to be "stamp collections" of animals and that fewer species with more individuals per species would be the way to go. Articles on captive reproduction dealt with pigmy chimps, lion tailed macaques, douroucoulis, sea otters, duikers, rare ibis and various Madagascan animals.
Blackduiker I personally own volumes 13 and 22. Have spent hours reading through additional volumes at the Los Angeles Central Library and the library at California State University Los Angeles while my wife was attending there.
I have an almost complete collection up to volume 41 (2007). I don't so far have the latest one, but unfortunately they are now so expensive to buy new that by the time I've got another money to buy a volume, the next one is published, so I'm always at least 1 volume behind. I have to say, though, that the earlier ones are the most interesting, as over the years they've become steadily less of a year book and much more of a scientific treatise. Personally I prefer articles dealing with new developments, than a lot of very technical stuff which is very important but, in my opinion, very dry.
Being at student at California State Polytechnic University: Pomona (Cal Poly Pomona), I have access to all of the current volumes online which is pretty cool. I started reading them a while ago, but I stopped since I had so much school work to do.