Books on Perturbation Methods

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I am having problems finding descent books on perturbation methods. I am looking for a book which covers; asymptotic expansions, matched Asymptotic expansions, Laplace's Method, Method of steepest Descent and the WKB method. Due to my style of learning I also need a book with lots of problems which either have solutions or are of the format 'show that ...' so you can check your answer. Does anyone have any suggestions?

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