Heilmann, P. G. F. (1972). On the formation of red soils in the lower Crati Basin, S. Italy. International Institute for Aerial Survey and Earth Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeilmann, P. G. F. On the Formation of Red Soils in the Lower Crati Basin, S. Italy. Enschede, Netherlands: International Institute for Aerial Survey and Earth Sciences, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeilmann, P. G. F. On the Formation of Red Soils in the Lower Crati Basin, S. Italy. International Institute for Aerial Survey and Earth Sciences, 1972.
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