Nugroho, F., & 		Hastuti, H.
(2019).
 CONSTRAINTS OF  GEOGRAPHY TEACHER OF SMA N 1 NGAGLIK IN DEVELOPING THE 2013 CURRICULUM LEARNING DEVICES  IN SLEMAN REGENCY.
<em>Geosfera Indonesia, 4</em>(1), 44-55.
doi:10.19184/geosi.v4i1.9294