00729naa#a2200205#i#450# EN\\bibl\120921 20260601184850.1 0536-101X 20251226b2025####ek#y0engy0150####ca RUS RU Field Testing of Algorithm for Refraction Coefficient Determining from Gradient Geodetic Measurements for Unilateral Trigonometric Levelling Journal article Moscow MIIGAiK 2025 16 с. Journal article local Тригонометрическое нивелирование. 528.024.4 RUS Высшая геодезия. 36.16 grnti Valov G. E. Vshivkova O. V. miigaik.editorum.ru