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1Digital revistaSCIELO
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2Digital revistaSCIELO
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3by Arzanlou, Mahdi, Kema, Gert H.J., Waalwijk, Cees, De Vries, Ineke, Araya Vargas, M., Helder, J., Crous, Pedro W.conference_item bibliotecaCIRAD FR
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4by Hosseinvand, Manouchehr, Eskandari, Ali, Azizi, K., Palomares Rius, Juan E., Castillo, Pablo, Abolafia, Joaquín, Ghaderi, Reza, Helder, J., Qing, Xue
Published 2023-11-30artículo bibliotecaIAS ES -
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6by Maldaun,Marcos V. C., Zambelli,Helder J. L., Dantas,Venâncio P., Fabiani,Renata M., Martins,Aline M., Brandão,Marcelo B., Lopes,Carlos E., Honorato,Donizete C.
Published 2002Digital revistaSCIELO -
7by 45841 Bakkes, J.A., 127230 van den Born, G.J., 76820 Helder, J.C., 122575 Swart, R.J., 78636 Hope, C.W., 103331 Parker, J.D.E.
Published 1994Texto bibliotecaIICA -
8An overview of environmental indicators: state of the art and perspectives An overview of environmental indicators: state of the art and perspectivesby Bakkes, J.A., Rijksinstituut voor Volksgezondheid en Milieuhygiene, Bilthoven (Netherlands) dut, Van den Born, G.J., Helder, J.C., Swart, R.J., Hope, C.W., UNEP, Nairobi (Kenya) eng
Published 1994Texto bibliotecaFAO IT