Akram 1997. Description of a new species and a new variety of the genus Contracaecum Railliet & Henry (Ascaridoidea: Anisakidae) and records of new host and locality of the genus Heterolyphlum [Heterotyphlum] Spaul (Ascaridoidea Raphidascarididae) from little cormorant in Pakistan. Biologia (Lahore), 43(1) 1997: 59-69