"Gums and resins." . . . . "Gomes i resines." . . . "... Gums & resins their occurrence, properties and uses"@en . "Gums and resins : their occurrence, properties and uses" . . . . "Gums and resins their occurrence, properties, and uses" . . . . . . . . . "Gums & resins : their occurrence, properties and uses" . . . . . . "Gums & Resins: their occurrence, properties and uses" . "Gums and resins: their occurrence, properties and uses"@en . "... Gums & resins, their occurrence, properties and uses"@en . "Guns and resins, their occurrence, properties and uses" . . . "Gums & resins : their occurence, properties and uses" . . . . . "Gums & resins, their occurrence, properties and uses"@en . . "Gums & resins, their occurrence, properties and uses" . "Gums & Resins" .