Rollin D. Salisbury and Arthur C. Trowbridge.
THE INTERPRETATION OF TOPOGRAPHIC MAPS
THE INTERPRETATION OF TOPOGRAPHIC MAPS, by Rollin D. Salisbury and Arthur C. Trowbridge. © on revision; 3Jun22, A661978. R56680, 4Jan50, Margaret Salisbury Drew (E), Helen L. Drew Richardson (E), Univ. of Chicago (E) & Arthur C. Trowbridge (A)
Margaret Salisbury Drew|E||Helen L. Drew Richardson|E||Univ. of Chicago|E||Arthur C. Trowbridge|A