Harald-Adam Velner : bibliograafia2015 https://www.ester.ee/record=b4532894*est

"Protection of the Coastal Wetland Area - Matsalu Catchment Area" : Estonian-Swedish Joint ProjectFrisen, Rune; Velner, Harald-Adam; Loigu, Enn; Blinova, Irina; Leisk, Ülle; Suurkask, Valdu; Iital, Arvo; Lääne, Ain; Merisaar, Maret; Krutova, Svetlana1995 https://www.ester.ee/record=b1465942*est

Veekaitse Eestis 1945-20022003 https://www.ester.ee/record=b1871646*est