Thin semi-gloss cardboard flipback sleeve, identical for mono/stereo version. Recorded October 19–22, 1970, studio Dejvice, Prague. Also released for PZO Artia as “Interjazz” with different cover artwork, identical catalog and matrix numbers, English track titles “Blow!” (A1), “Ritual” (B2), “Autumn Sun” (B3). Matrix / Runout: E 1979 (Label A) Matrix / Runout: E 1980 (Label B) Rights Society: OSA Price Code: H Other: none (Manufacturing date code)