"agor, r . "
a text book of surveying and levelling: / r.. agor - 8 ed. - delhi : khanna 1996. - "xxii, 968p.; 21 cm."
surveying
TA545 / .A36 1995
a text book of surveying and levelling: / r.. agor - 8 ed. - delhi : khanna 1996. - "xxii, 968p.; 21 cm."
surveying
TA545 / .A36 1995