Muhammad Khan, Syed Shahzad Ali and Rabail Rani Soomro 2014. ORIGINAL ARTICLE: Efficacy of C1-C2 Sustained Natural Apophyseal Glide (SNAG) Versus Posterior Anterior Vertebral Mobilization (PAVMs) in the Management of Cervicogenic Headache. Journal of Basic & Applied Sciences. 10, (Jan. 2014), 226–230. DOI:https://doi.org/10.6000/1927-5129.2014.10.31.