Under siege: man, men, and earthde Kenneth Allan WagnerMateriasEcologyEffect of environment onEffect of human beings onHuman beingsNatureEdiciones (1)Under siege: man, men, and earth (1973)Intext Educational Publishers · inglésMás obras de Kenneth Allan WagnerNNotes on Indiana liverwortsNotes on Indiana liverwortsTThe operculum of Schlotheimia lancifolia BartramThe operculum of Schlotheimia lancifolia BartramUUnder siegeUnder siege