my hardcopy ( if thats what you mean ) anyway don't want to sell my only copy ( which i will have to find first ) anyway as i gave my other hard copy away .
but OP . if your studying gas don't you think getting a text book for the right money is part of the course
The viper book is worth every penny .it is an excellent companion for study as well as reference material.
Money spent on CPD is just an investment in yourself
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