Progressive rock recommendations

Straight from Bill Martin's Listening to the Future: The Time of Progressive Rock, 1968-1978, a list of recommended progressive rock albums. Bold ones I already have, italicized ones I don't want. Posted mainly so I can consult at work while listening to Spotify, and also because multimarkdown makes posting lists really easy.

Someday I'll have to do the same for the Prog magazine top 100.

Bold albums are ones I have, struck albums are ones I don't want.

1968:

1969:

1970:

1971:

1972:

1973:

1974:

1975:

1976:

1977:

1978: