A text-book of assaying :
Beringer, Cornelius,
A text-book of assaying : For the use of those connected with mines / By c. beringer, and j. j. beringer - 3 # rev. - xvi, 399 páginas
Ensayos
TN550 / B47 1895
A text-book of assaying : For the use of those connected with mines / By c. beringer, and j. j. beringer - 3 # rev. - xvi, 399 páginas
Ensayos
TN550 / B47 1895