Tabak J. int, 1985, 2, p. 110-3, ISSN.0039-8627 Chemical weed control in tobacco COLLINS W.K. Devrinol. Tillam. Enide. Prowl. Paarlan. Surflan....
Tabak J. int, 1985, 4, p. 312-7, ISSN.0039-8627 Top plants and control suckers for quality tobacco COLLINS W.K. MH. FST-7. Prime +. Bud Nip....
Tabak J. int, 1982, 2, p. 105-108, ISSN.0039-8627 Nitrogen, most important nutrient for tobacco quality COLLINS W.K.
Tabak J. int, 1981, 4, p. 328-30, ISSN.0039-8627 Cultural practices increase nicotine content of US flue-cured leaf COLLINS W.K.