5 full conductor's score of contemporary compositions by various composers:  

1. A full score of an excerpt from Penderecki's 'Recordare Jesu Pie' for solo voices, mixed choir and symphony orchestra. 
This piece is one movement from the 'Polish Requiem' by the composer, and is part of the 'Sequence DIES IRAE'. It is based on 'Swiety Boze' which is the Polish translation of the Trisagion which is a standard hymn of the ancient origin of the Divine Liturgy in some orthodox and eastern catholic churches. 
This was published in Poland in 1983 by PWM editions. 
This is a large score - 30 x 42cms. It is in great condition. 

2. A full score of Arne Mellnas's 'L'Infinito' for unaccompanied choir. 
Published in 1984, in Stockholm Sweden by Edition Reimers.  

3. A full score of Edward Bury's 'Warsaw Threnodies' for Baritone, mixed chorus and symphony orchestra. 
Published in 1982 in Krakow, Poland, by PWM Editions. 
The piece was first performed in 1975 in Warsaw.
This is a large full score of the piece  - 42 x 30 cms.   

4. A full score of Marek Stachowski's 'Choreia' for symphony orchestra. 
Published in 1989 in Warsaw, Poland, by PWM Editions. 
The piece was first performed in 1981.
This is a large full score of the piece  - 42 x 30 cms.  

5. A full score of Juliusz Luciuk's 'San Francesco d'Assisi' for Soprano, Tenor, Baritone, Mixed chorus and symphony orchestra. 
 Published in 1987 in Warsaw, Poland, by PWM Editions. 
The piece was first performed in 1976.
This is a large full score of the piece  - 42 x 30 cms.  

I found these at a flea market in Paris earlier this year. They came from a big collection of items from someone who must have been heavily involved in the contemporary music scene.