00501nam a22001937a 4500003000500000005001700005008004100022010001000063011001000073035001000083040000900093082001700102100002800119245006300147260003000210300002000240650002600260650002100286CHAP20220329140745.0971013s1948 nyua r 00010 eng d a57162 a58134 a62289 cCHAP04a634.93bS68a00aSpurr, Stephen Hopkins.10aAerial photographs in forestryc/por Stephen Hopkins Spurr aNew York :bRonald,c1948 a340 p. :bilus.14aFotografía aérea.14aFotogrametría.