00630nam 2200229z- 450 991070817900332120241218120707.0(CKB)3780000000223505(DcWaBHL)45807(EXLCZ)99378000000022350520240129c1906uuuu -u- -engA manual of topographic methodsWashingtonGovt. print. off18931 online resourceTopographical surveyingTopographical surveyingWSUBOOK9910708179003321A manual of topographic methods4446301UNINA