A electrificação de Portugal e o seu aspecto agrícola / Belfort Cerqueira
Valorização dos efluentes térmicos na agricultura [[1 desdobrável]] / EDP, Central Térmica de Setúbal
Philips. Lighting technology in horticullture
Philips. Light in agriculture
Philips. Artificial ligth and the grower an aid to bigger profits
Philips. Lighting schemes for plant irradiation
Philips. Luminaires pour l`irradiation des plantes