Emergency Conservation Committee (U.S.) · 6 obras en el catálogoObrasDisaster to the Yellowstone Park elk herdsThe slaughter of the Yellowstone Park pelicansTwelve immediately important problems of the national parks and of wild life conservationAA last plea for waterfowlA last plea for waterfowlMMan's friend : the crow ..Man's friend : the crow ..TThe proposed Olympic National ParkThe proposed Olympic National Park
