Jan Akkerman

• Jan Akkerman (Official website)
• Akkernet
• Jan Akkerman (IRS)
• Focus
• Brainbox

Alquin

• Alquin (Official website)
• Alquin
• Alquin at Pinkpop
• Ferdinand Bakker interview
• Michel van Dijk interview

Bonfire

• Bonfire
• Eugene den Hoed

Bowl

• Bowl

Brainbox

• Brainbox
• Kaz Lux
• Jan Akkerman

Cargo

• Cargo
• Cargo
• September

Cosmic Dealer

• Cosmic Dealer
• Cosmic Dealer

Crying Wood

• Waterloo Station

Drama

• Drama
• Polle Eduard (Official website)

Dream

• Dream

Earth&Fire

• Earth and Fire
• Earth and Fire
• Earth and Fire
• Ton Scherpenzeel

Ekseption

• Ekseption
• Ekseption & Rick van der Linden (Official website)

Finch

• Finch
• Peter Vink
• Interview

Focus

• Focus (Official website)
• Focus Fan Association Homepage
• Focus collection
• Focus
• Focus (IRS)
• Jan Akkerman

Fragile

• Fragile

Groep 1850

• Groep 1850

• Kayak (Official website)
• Periscope Life
• Kayak
• Ton Scherpenzeel

• Sample
• Pivate dutch
• Polumnia website

• The Magic Twanger (Official website)

• Light
• Sample

• Philip de Goey

• Mr Albert Show (myspace)
• Bertus Borgers

Pat Cool

• Ge Titulaer

Saga

• Saga

• The Official Camel Homepage
• Kayak
• Earth & Fire

Solution

• Solution(Official website)
• Solution
• Forum
• Hans Waterman interview

Supersister

• Supersister (Official website)
• Supersister
• Supersister
• Robert Jan Stips (Official website)
• Herman van Boeyen

Trace

• Trace
• Rick van der Linden (Official website)

• Ange
• Agitation Free
• Amon Düül II
• Babe Ruth
• Banco Del Mutuo Soccorso
• Beggars Opera
• Camel
• Caravan
• Cressida
• Emerson, Lake and Palmer
• Fruupp
• Genesis
• Gentle Giant
• Gilgamesh
• Gnidrolog
• Gong
• Gracious
• Grobschnitt
• Gryphon
• Happy The Man
• Hatfield and the North
• Hawkwind
• Henry Cow
• Jethro Tull
• King Crimson
• Mahavishnu Orchestra
• Marsupilami
• Matching Mole
• National Health
• Nektar
• Pavlov's Dog
• Pink Floyd
• Premiata Forneria Marconi
• Soft Machine
• Spring
• Van Der Graaf Generator
• Yes

• Nationaal Pop Instituut
• Nederpop Encyclopedia
• DPH
• Nederpop Music
• Fonos (to buy digitalised albums)

• Calyx
• Classic Rock
• Dutch Progressive Rock Pages
• Gibraltar Encyclopedia of Progressive Rock
• Krautrock.net
• Prog-nose
• Progressive Ears
• Progressive Newsletter
• Progressive World
• Progarchives
• The Axiom of Choice