| Algemeen |
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| Successful gardening with limited water M.T.Weatly
pp 128 pb Santa Barbara, 1978 |
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| Plants for dry climates How to select, grow
and enjoy M.R.Duffield, W.D.Jones pp 176 pb A4 Tucson, 1981 |
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| Plants for dry gardens J.Taylor pp 192 hc
st London, 1993 |
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| Monografieen |
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| *The Aloes of South Africa
G.W.Reynolds pp 534 hc 3e dr A.A.Balkema Cape Town/Rotterdam, 1974 |
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| Mammillaria index R.Mottram pp 103 pb typoschr.
Sutton-under-Whitestonecliffe, 1980 |
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| La collezione di cicadee del Giardino
dei Semplici G.C.Ciuffi, L.di Fazio pp 41 pb Publicazione 7 dell'orto botanico
di Firenze, 1995 |
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