TY - BOOK T1 - Aerial photographs : Their use and interpretation T2 - Harper's Geoscience A1 - Eardley, A. J. PP - New York PB - Harper and Brothers Publishers YR - 1942 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dun.135420 OP - 203 ER -