Pop

POP was founded in 1965 by Swiss entrepreneur Jürg Marquard and was THE Swiss music magazine, later also distributed in Germany. The magazine was published monthly, from September 1972 biweekly.
After various mergers with other German youth magazines, POP became POP/ROCKY, which was for many years Germany's second largest youth magazine. (wikipedia)
All POP cover pictures are archived at bravo-archiv.de.

1968 November

No. 11 Issue 33

Underground und Symphonie-Orchester: Frank Zappa
Interview by Rolf-Ulrich Kaiser, 3 pp (unpaged)
Zappa kostete nur 100 Mark
2 pp, (unpaged)

This issue has two important articles:
1) interview with Frank Zappa made by Rolf-Ulrich Kaiser in Zappa's home and
2) overview article on international festival in Essen (IEST 1968), first big festival in Germany with the Mothers Of Invention and The Fugs as headliners.

Source: Roland Blattner

1968 December

No. 12 Issue 34

Frank Zappa on the back cover. No other Zappa-related content inside.

Source: Roland Blattner

1969 December

Vol. 4 No. 12 Issue 45

Underground-Gott Frank Zappa jagte seine Mothers of Invention zum Teufel
(Underground God Frank Zappa chased his Mothers of Invention to hell)
By ?, 2 pp (unpaged)

Source: Roland Blattner

1970 September

Vol. 5 No. 9 Issue 55

Bath was beautiful
By ?, 4 pp (unpaged)

Issue contains a 4-page article on Bath Festival of Blues & Progressive Music and full page Frank Zappa poster.

Source: Roland Blattner

1970 December

Vol. 5 No. 12 Issue 58

Full page Mothers Of Invention picture and German concert dates for December 1970.

Source: slime.oofytv.set

1971 February

Vol. 6 No. 2 Issue 60

Full page Frank Zappa picture on 3rd page. No other Zappa-related content.

Source: slime.oofytv.set

1971 April

Vol. 6 No. 4 Issue 62

Mothers Of Invention – nicht mehr die alten
By ?, pp 4-5 (unpaged)

The issue contains a big (57 x 83 cm) Zappa color poster.

1972 February

Vol. 7 No. 2 Issue 72

Zappa und das Feuer von Montreux
By Elias, 1 p (unpaged)

Source: Roland Blattner

1972 April

Vol. 7 No. 4 Issue 74

Die Frank Zappa-Story (Pt I)
By Urban Gwerder, pp 12-15 (unpaged)

1972 May

Vol. 7 No. 5 Issue 75

Zappa Zauber (Die Frank Zappa-Story Pt II)
By Urban Gwerder, pp 22-23 (unpaged)

Source: slime.oofytv.set

1972 July

Vol. 7 No. 7 Issue 77

Mothers "Just Another Band From L.A."
By ?, 1 p

Source: Fulvio Fiore

1972 September 28

Vol. 7 No. 10 Issue 80

Frank Zappa "Waka/Jawaka"
By ?, 1 p

Source: Fulvio Fiore

1972 November 23

Vol. 7 No. 14 Issue 84

Frank Zappa
Ex-Mutter Zappa und sein neues «Hot Rats Orchestra» in Berlin
By ?, 2 pp (unpaged)

Source: Roland Blattner

1973 December 6

Vol. 8 No. 25 Issue 111

Der grosse Ton unterwegs (The big note on the way)
By ?, 1 p (unpaged)
Mit Schneewittchen und den 7 Zwergen auf Yurrip-Expedition
(With Snow White and the 7 Dwarfs on Yurrip Expedition)
By Urban Gwerder, 2 pp (unpaged)
Klassengesellschaft bei Zappa? (Class society at Zappa?)
By ?, 1 p (unpaged)

Source: Roland Blattner

1974 November

Vol. 9 No. 23 Issue 135

10 Jahre Zappa & Mothers (Zappa & Mothers 10 Years)
By Urban Gwerder, 3 pp (unpaged)

Source: Roland Blattner

1974 November

Vol. 9 No. 24 Issue 136

Step-Schritt für den "Mann vom Klo" (Step for the "man from the loo")
By ?, 1 p (unpaged)

Source: Roland Blattner