Authors: FRAENKEL PL CRICK FJ COWLEY PD

Citation: Pl. Fraenkel et al., WIND POWER FOR PUMPING - THE DEVELOPMENT OF THE ITP WINDPUMP, Renewable energy, 16(1-4), 1999, pp. 916-921

Authors: COWLEY PD COMPAGNO LJV

Citation: Pd. Cowley et Ljv. Compagno, A TAXONOMIC REEVALUATION OF THE BLUE STINGRAY FROM SOUTHERN AFRICA (MYLIOBATIFORMES, DASYATIDAE), South African journal of marine sciences, 13, 1993, pp. 135-149