International Seminar on Integrated Surveys of Natural Grazing Areas ( : 1967 : Delft) creator text conference publication Delft ITC-UNESCO Centre 1967-68 1967 monographic pág. varía : ilus. Contenido: S15 The pampa problem and its solution.- S16 The landscape concept and its use in the study of grassland territories.- S17 Grass land surveys and grassland production problems of cattle in grazing areas.- S20 Integrated surveys of pastoral ar 16 folletos numerados S.15 a S.28, agrupados en una caja Pastoreo Congresos 636.0842 I5 1967 58684 971013 20220329140843.0