Publication year: 1991 Source publication information Series: JPERDP Interim Report; 32 Source: Held at PADP Northern Zone, Mangu, 4-6 & 11 December 1991 Publisher Jos Plateau Environmental Resources Development Programme (JPERDP)|Plateau Agricultural Development Programme (PADP) Publisher reference: Jos Plateau Environmental Resources Development Programme (JPERDP)|Plateau Agricultural Development Programme (PADP)