METHOD OF DETERMINING AVERAGE SLOPE OF ELEMENTARY AREA IN FIELD AND PROFILE RECORDER FOR ITS IMPLEMENTATION von VASIL'EV SERGEJ ANATOL'EVICH, ALEKSEEV EVGENIJ PETROVICH, MAKSIMOV IVAN IVANOVICH, ALEKSEEV VIKTOR VASIL'EVICH, VASIL'EV MIKHAIL ANDRIANOVICH, MAKSIMOV VLADIMIR IVANOVICH, VASIL'EV ALEKSEJ ANATOL'EVICH

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