Bollettino del gruppo grotte cai novara,Italy,Gruppo Grotte Novara; Club Alpino Italiano,37,Sep,2018
Bollettino informativo del Gruppo speleologico bolognese, C.A.I.,Italy,Gruppo Speleologico Bolognese; Club Alpino Italiano,148,Jan-Jun,2019
Bollettino Informativo Gruppo Speleologico Piemontese,Italy,Gruppo Speleologico Piemontese,169,2018
Bollettino Informativo Gruppo Speleologico Piemontese,Italy,Gruppo Speleologico Piemontese,170,2018
Bulletin of the Federation Francaise De Speleologie,France,156,Dec,2019
Bulletin of the Sydney University Speleological Society,Australia,4,Jul-Sep,2019
Cave Diving Group Newsletter,UK,British Caving Association,214,Jan,2020
Descent,UK,Wild Places,272,Feb/Mar,2020
Journal of the Australian Speleological Federation Inc,Australia,210,Dec,2019
Journal of the Wessex Cave Club,UK,Wessex Cave Club,353,Jan,2020,
Luola,Finland,Finnish Caving Society,6,,2019
Norsk Grotteblad,Norway,Norwegian Speleological Society,73,Dec,2019
NSS (News),USA,National Speleological Society,1,Jan,2020
NSS (News),USA,National Speleological Society,2 Feb,2020
Organ Sveriges Speleolog Furbund,Sweden,4,Dec,2019
RRCPC Newsletter,UK,Red Rose Cave and Pothole Club,1,Jan,2020
Slovensky Kras,Slovakia,Sborni?k Mu?zea Slovenskeho krasu,57,1,2019
Slovensky Kras,Slovakia,Sborni?k Mu?zea Slovenskeho krasu,57,2,2019
SOK mededelingen,Netherland,Studiegroep Onderaardse Kalksteengroeven,72,Dec,2019
South Wales Caving Club Newsletter,UK,South Wales Caving Club,136,Oct,2019
VVS ,Belgium,Verbond van Vlaamse Speleologen,,Dec,2019
West Virginia Caver (The),USA,West Virginia Association for Cave Studies,1,Feb,2020