"Sisal hemp" . . . . "Sisal : twenty-five year's sisal research" . . . . . . "Sisal : 25 years' sisal research" . . . "Sisal : twenty-five years' sisal experience"@en . . . "Sisal. Twenty-five years' sisal research. [With plates.]"@en . "Sisal. Twenty-five years' sisal research. [With plates.]" . . . . . "Sisal : thirty years' research sisal in Tanzania" . . . . "Sisal" . . "Sisal : Twenty-five years' sisal research" . . . "Sisal; twenty-five years' sisal research"@en . . "Sisal: twenty-five years' sisal research : twenty-five years' sisal research"@en . . . "Sisal : twenty-five years' sisal research" . "Sisal : twenty-five years' sisal research"@en . . . . "History and development of the sisal industry; The sisal plant and other fibre agaves; Planting material and nursery technique; Establishment of field sisal; Spacing; Cultivation systems; Culting; Plant nutrition and deficiency diseases; Soils of the sisal-growing areas in Tanganyika and Kenya; Inorganic and organic manuring of sisal; Pests and diseases; Breeding long fibre agaves; Characteristics of sisal fibre; Decortication and fibre preparation; Planning and organization of a sisal estate." . "Sisal twenty-five years' sisal research"@en . . . . . . . "Sisal 25 years' Sisal research" . "Sisal Tanzanie." . . "Sisal." . .