Ngo's catalogs

"1997 Ngo's Catalogue of Philippine Republic Stamps & Postal
                                     Stationeries"
"Ngo's Catalogue of Philippine Republic Stamps 1998 Supplement"
"Ngo's Catalogue of Philippine Republic Stamps 1999 Supplement"
"Ngo's Catalogue of Philippine Republic Stamps 2000 Supplement"
"Ngo's Catalogue of Philippine Republic Stamps 2002 Supplement"
"Specialized Catalogue of Philippine Republic Stamps 1973-1989"

All by Dr. Ngo Tiong Tak.
Published by The Stamp Shop (except the Specialized).

These catalogs are issued in full color.
Prices are in Philippine pesos (except the Specialized which is in US dollars).

Bought my copies at various times in Manila.