00606nam 2200217z- 450 991070817900332120241218120707.0(CKB)3780000000223505(DcWaBHL)45807(EXLCZ)99378000000022350520240129c1906uuuu -u- -engManual of topographic methodsWashingtonGovt. print. off18931 online resourceTopographical surveyingTopographical surveyingBOOK9910708179003321Manual of topographic methods3875336UNINA