Big PDF but this very important paper from Bristol is essential reading - all vets and trainers should really have made themselves familiar with this review: www.pawsoflife.org/Library/Behavior/Bradshaw_2009.pdf
A few others for a flavour of what's out there:
www.sciencedirect.com/science/article/pii/S0168159108003717
www.sciencedirect.com/science/article/pii/S1558787807002766
www.ingentaconnect.com/content/bloomsbury/azoos/2005/00000018/00000003/art00003
And this website, which was written by Dr Rachel Casey, also of Bristol, is endorsed by the RSPCA, Dogs Trust, Wood Green, the APBC, the APDT and several veterinary behaviour and ethology organisations:
www.dogwelfarecampaign.org/
noddingoff I really feel your frustration - I spent my early years in practice driven demented by the public's inability to handle their pets. But you know what, most of the time the snarling scrabbling shitting Westie which is entwined in mortal combat with you over having its nails clipped is perfectly fine at home, and actually the owners did not identify any need to train it to cope with this sort of handling. Yes, the gold star clients who socialise and habituate their puppies from day one are few and far between, but actually if a dog is a rescue then there is every possibility that expecting well-meaning but less knowledgeable clients to be able to undertake the sort of intensive DS/CC programme required to overcome a complete lack of adequate socialisation is just unrealistic. Especially when their dog poses them no problems at home.
The best our profession can do in these cases is identify the motivation (usually fear), adapt our techniques, and also communicate well with the owners who often feel a mixture of distress, anxiety, and guilt that their dog is so frightened, we are at risk and they are unable to control the situation.