H.R. Pfau [1969-74?}
Astrophilatelie: Handbuch fur den Weltraumsammler Astrophilatly; Handbook for space exploration collectors
| Topical Collecting -- Rockets and Space | Topical Collecting -- Astronomy | Catalogs and Price Lists | Postal Markings | Postal Stationery
Astrophilatelie: Handbuch fur den Weltraumsammler Astrophilatly; Handbook for space exploration collectors
| Topical Collecting -- Rockets and Space | Topical Collecting -- Astronomy | Catalogs and Price Lists | Postal Markings | Postal Stationery