TY - JOUR TI - New historical findings discovery at inner areas of Akçakale Castle (Trabzon, Turkey) with GPR Method AU - OGRETMEN AYDIN, Z. AU - ERDEN BABACAN, A. AU - SEREN, A. AU - GELISLI, K. JO - Sigma Journal of Engineering and Natural Sciences PY - 2022 VL - 40 SP - 344 EP - 355 DO - 10.14744/sigma.2022.00037 ER -