%0 Journal Article %T Seasonal Variation of Radio Refractivity of Some Selected Stations in Northern Nigeria %A M. A. Bilya %A M. M. Tanko %A M. U. Sarki %J Journal Information: New name: ISSN: Past name: ISSN: NLM ID: Frequency: Journal DOI: Peer-review model: NAAS Score (2017): Digital Archiving: %D 2019 %R 10.9734/CJAST/2019/45326 %X Reviewers: %U http://www.sciencedomain.org/abstract/28071