TY  - BOOK
ED  - Gurley (firma Comercial)
TI  - A manual of the principal instruments used in american engineering and surveying manufactured by w. & l. e. gurley, troy, n. v
AV  - TA581 G87 1889
PY  - 1889///
CY  - Troy, new york
PB  - W. & l. e. gurley
KW  - Topografía
KW  - Instrumentos
KW  - Catalogos
ER  -